Sorry for the delay in my answer, but this did not work unfortunately
I've added boot.txt here
[ 0.000000] Linux version 5.4.128 (builder@buildhost) (gcc version 8.4.0 (OpenWrt GCC 8.4.0 r17086-3c3a96df3f)) #0 SMP Fri Jul 2 19:50:12 2021
[ 0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[ 0.000000] printk: bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 0001992f (MIPS 1004Kc)
[ 0.000000] MIPS: machine is Zbtlink ZBT-WE1326
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] VPE topology {2,2} total 4
[ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 0.000000] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x000000000fffffff]
[ 0.000000] HighMem [mem 0x0000000010000000-0x0000000023ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x000000001bffffff]
[ 0.000000] node 0: [mem 0x0000000020000000-0x0000000023ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000023ffffff]
[ 0.000000] On node 0 totalpages: 131072
[ 0.000000] Normal zone: 576 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 65536 pages, LIFO batch:15
[ 0.000000] HighMem zone: 65536 pages, LIFO batch:15
[ 0.000000] percpu: Embedded 14 pages/cpu s26512 r8192 d22640 u57344
[ 0.000000] pcpu-alloc: s26512 r8192 d22640 u57344 alloc=14*4096
[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 130496
[ 0.000000] Kernel command line: console=ttyS0,115200 rootfstype=squashfs,jffs2
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[ 0.000000] Writing ErrCtl register=00050210
[ 0.000000] Readback ErrCtl register=00050210
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] Memory: 509288K/524288K available (6299K kernel code, 206K rwdata, 1320K rodata, 1248K init, 238K bss, 15000K reserved, 0K cma-reserved, 262144K highmem)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 0.000000] NR_IRQS: 256
[ 0.000000] random: get_random_bytes called from start_kernel+0x36c/0x584 with crng_init=0
[ 0.000000] CPU Clock: 880MHz
[ 0.000000] clocksource: GIC: mask: 0xffffffffffffffff max_cycles: 0xcaf478abb4, max_idle_ns: 440795247997 ns
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 4343773742 ns
[ 0.000009] sched_clock: 32 bits at 440MHz, resolution 2ns, wraps every 4880645118ns
[ 0.007838] Calibrating delay loop... 586.13 BogoMIPS (lpj=2930688)
[ 0.073992] pid_max: default: 32768 minimum: 301
[ 0.078811] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.086012] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.096861] rcu: Hierarchical SRCU implementation.
[ 0.102270] smp: Bringing up secondary CPUs ...
[ 4.029126] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 4.029137] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 4.029151] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 4.029263] CPU1 revision is: 0001992f (MIPS 1004Kc)
[ 0.167104] Synchronize counters for CPU 1: done.
[ 4.128935] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 4.128944] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 4.128952] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 4.129016] CPU2 revision is: 0001992f (MIPS 1004Kc)
[ 0.257937] Synchronize counters for CPU 2: done.
[ 4.209875] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 4.209884] Primary data cache 32kB, 4-way, PIPT, no aliases, linesize 32 bytes
[ 4.209893] MIPS secondary cache 256kB, 8-way, linesize 32 bytes.
[ 4.209958] CPU3 revision is: 0001992f (MIPS 1004Kc)
[ 0.343125] Synchronize counters for CPU 3: done.
[ 0.372995] smp: Brought up 1 node, 4 CPUs
[ 0.381460] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.391228] futex hash table entries: 1024 (order: 3, 32768 bytes, linear)
[ 0.398323] pinctrl core: initialized pinctrl subsystem
[ 0.405404] NET: Registered protocol family 16
[ 0.423051] FPU Affinity set after 11720 emulations
[ 0.441945] workqueue: max_active 576 requested for napi_workq is out of range, clamping between 1 and 512
[ 0.453799] clocksource: Switched to clocksource GIC
[ 0.460466] thermal_sys: Registered thermal governor 'step_wise'
[ 0.461019] NET: Registered protocol family 2
[ 0.471538] IP idents hash table entries: 4096 (order: 3, 32768 bytes, linear)
[ 0.479780] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[ 0.488153] TCP established hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.495852] TCP bind hash table entries: 2048 (order: 2, 16384 bytes, linear)
[ 0.502917] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.509388] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.515881] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.523078] NET: Registered protocol family 1
[ 0.527404] PCI: CLS 0 bytes, default 32
[ 0.763562] 4 CPUs re-calibrate udelay(lpj = 2924544)
[ 0.769897] random: fast init done
[ 0.770396] workingset: timestamp_bits=14 max_order=17 bucket_order=3
[ 0.792708] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.798516] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.810158] bounce: pool size: 64 pages
[ 0.814066] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[ 0.823699] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 0.829486] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 0.835379] mt7621_gpio 1e000600.gpio: registering 32 gpios
[ 0.841791] Serial: 8250/16550 driver, 16 ports, IRQ sharing enabled
[ 0.851989] printk: console [ttyS0] disabled
[ 0.856311] 1e000c00.uartlite: ttyS0 at MMIO 0x1e000c00 (irq = 19, base_baud = 3125000) is a 16550A
[ 0.865303] printk: console [ttyS0] enabled
[ 0.873537] printk: bootconsole [early0] disabled
[ 0.886195] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[ 0.901733] spi-nor spi0.0: w25q128 (16384 Kbytes)
[ 0.906619] 4 fixed-partitions partitions found on MTD device spi0.0
[ 0.912942] Creating 4 MTD partitions on "spi0.0":
[ 0.917743] 0x000000000000-0x000000030000 : "u-boot"
[ 0.924304] 0x000000030000-0x000000040000 : "u-boot-env"
[ 0.930896] 0x000000040000-0x000000050000 : "factory"
[ 0.937504] 0x000000050000-0x000001000000 : "firmware"
[ 0.944329] 2 uimage-fw partitions found on MTD device firmware
[ 0.950237] Creating 2 MTD partitions on "firmware":
[ 0.955222] 0x000000000000-0x00000027aa68 : "kernel"
[ 0.961604] 0x00000027aa68-0x000000fb0000 : "rootfs"
[ 0.967944] mtd: device 5 (rootfs) set to be root filesystem
[ 0.973797] 1 squashfs-split partitions found on MTD device rootfs
[ 0.979959] 0x000000570000-0x000000fb0000 : "rootfs_data"
[ 0.988041] libphy: Fixed MDIO Bus: probed
[ 1.034119] libphy: mdio: probed
[ 1.037603] mt7530 mdio-bus:1f: MT7530 adapts as multi-chip module
[ 1.047858] mtk_soc_eth 1e100000.ethernet eth0: mediatek frame engine at 0xbe100000, irq 22
[ 1.058566] mt7621-pci 1e140000.pcie: Parsing DT failed
[ 1.066555] NET: Registered protocol family 10
[ 1.072558] Segment Routing with IPv6
[ 1.076386] NET: Registered protocol family 17
[ 1.080891] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 1.094110] 8021q: 802.1Q VLAN Support v1.8
[ 1.102114] mt7530 mdio-bus:1f: MT7530 adapts as multi-chip module
[ 1.121587] libphy: dsa slave smi: probed
[ 1.126110] mt7530 mdio-bus:1f lan1 (uninitialized): PHY [dsa-0.0:00] driver [Generic PHY]
[ 1.135973] mt7530 mdio-bus:1f lan2 (uninitialized): PHY [dsa-0.0:01] driver [Generic PHY]
[ 1.145840] mt7530 mdio-bus:1f lan3 (uninitialized): PHY [dsa-0.0:02] driver [Generic PHY]
[ 1.155710] mt7530 mdio-bus:1f lan4 (uninitialized): PHY [dsa-0.0:03] driver [Generic PHY]
[ 1.165692] mt7530 mdio-bus:1f wan (uninitialized): PHY [dsa-0.0:04] driver [Generic PHY]
[ 1.175503] mt7530 mdio-bus:1f: configuring for fixed/rgmii link mode
[ 1.186782] DSA: tree 0 setup
[ 1.190151] rt2880-pinmux pinctrl: pcie is already enabled
[ 1.195809] mt7621-pci-phy 1e149000.pcie-phy: PHY for 0xbe149000 (dual port = 1)
[ 1.203375] mt7621-pci-phy 1e14a000.pcie-phy: PHY for 0xbe14a000 (dual port = 0)
[ 1.310812] mt7621-pci-phy 1e149000.pcie-phy: Xtal is 40MHz
[ 1.316393] mt7621-pci-phy 1e14a000.pcie-phy: Xtal is 40MHz
[ 1.421902] mt7621-pci 1e140000.pcie: pcie0 no card, disable it (RST & CLK)
[ 1.428850] mt7621-pci 1e140000.pcie: pcie2 no card, disable it (RST & CLK)
[ 1.435805] mt7621-pci 1e140000.pcie: PCIE1 enabled
[ 1.440665] mt7621-pci 1e140000.pcie: PCI coherence region base: 0x60000000, mask/settings: 0xf0000002
[ 1.450136] mt7621-pci 1e140000.pcie: PCI host bridge to bus 0000:00
[ 1.456509] pci_bus 0000:00: root bus resource [io 0x1e160000-0x1e16ffff]
[ 1.463353] pci_bus 0000:00: root bus resource [mem 0x60000000-0x6fffffff]
[ 1.470217] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 1.475747] pci 0000:00:00.0: [0e8d:0801] type 01 class 0x060400
[ 1.481762] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x7fffffff]
[ 1.488024] pci 0000:00:00.0: reg 0x14: [mem 0x60300000-0x6030ffff]
[ 1.494359] pci 0000:00:00.0: supports D1
[ 1.498352] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[ 1.505728] pci 0000:01:00.0: [14c3:7662] type 00 class 0x028000
[ 1.511770] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x000fffff 64bit]
[ 1.518614] pci 0000:01:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[ 1.525406] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[ 1.532822] pci 0000:00:00.0: PCI bridge to [bus 01-ff]
[ 1.538070] pci 0000:00:00.0: bridge window [io 0x0000-0x0fff]
[ 1.544158] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
[ 1.550916] pci 0000:00:00.0: bridge window [mem 0x60100000-0x601fffff pref]
[ 1.558134] pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
[ 1.564781] pci 0000:00:00.0: BAR 0: no space for [mem size 0x80000000]
[ 1.571364] pci 0000:00:00.0: BAR 0: failed to assign [mem size 0x80000000]
[ 1.578321] pci 0000:00:00.0: BAR 8: assigned [mem 0x60000000-0x600fffff]
[ 1.585101] pci 0000:00:00.0: BAR 9: assigned [mem 0x60100000-0x601fffff pref]
[ 1.592291] pci 0000:00:00.0: BAR 1: assigned [mem 0x60200000-0x6020ffff]
[ 1.599079] pci 0000:00:00.0: BAR 7: assigned [io 0x1e160000-0x1e160fff]
[ 1.605867] pci 0000:01:00.0: BAR 0: assigned [mem 0x60000000-0x600fffff 64bit]
[ 1.613154] pci 0000:01:00.0: BAR 6: assigned [mem 0x60100000-0x6010ffff pref]
[ 1.620366] pci 0000:00:00.0: PCI bridge to [bus 01]
[ 1.625330] pci 0000:00:00.0: bridge window [io 0x1e160000-0x1e160fff]
[ 1.632088] pci 0000:00:00.0: bridge window [mem 0x60000000-0x600fffff]
[ 1.638868] pci 0000:00:00.0: bridge window [mem 0x60100000-0x601fffff pref]
[ 1.646685] mt7530 mdio-bus:1f: Link is Up - 1Gbps/Full - flow control off
[ 1.654092] hctosys: unable to open rtc device (rtc0)
[ 1.667199] VFS: Mounted root (squashfs filesystem) readonly on device 31:5.
[ 1.679079] Freeing unused kernel memory: 1248K
[ 1.683700] This architecture does not have kernel memory protection.
[ 1.690117] Run /sbin/init as init process
[ 2.474290] init: Console is alive
[ 2.477939] init: - watchdog -
[ 3.874402] kmodloader: loading kernel modules from /etc/modules-boot.d/*
[ 4.031041] usbcore: registered new interface driver usbfs
[ 4.036688] usbcore: registered new interface driver hub
[ 4.042086] usbcore: registered new device driver usb
[ 4.058511] xhci-mtk 1e1c0000.xhci: 1e1c0000.xhci supply vbus not found, using dummy regulator
[ 4.067279] xhci-mtk 1e1c0000.xhci: 1e1c0000.xhci supply vusb33 not found, using dummy regulator
[ 4.076266] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
[ 4.081587] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 1
[ 4.103824] xhci-mtk 1e1c0000.xhci: hcc params 0x01401198 hci version 0x96 quirks 0x0000000000290010
[ 4.113004] xhci-mtk 1e1c0000.xhci: irq 21, io mem 0x1e1c0000
[ 4.120167] hub 1-0:1.0: USB hub found
[ 4.124149] hub 1-0:1.0: 2 ports detected
[ 4.128897] xhci-mtk 1e1c0000.xhci: xHCI Host Controller
[ 4.134308] xhci-mtk 1e1c0000.xhci: new USB bus registered, assigned bus number 2
[ 4.141776] xhci-mtk 1e1c0000.xhci: Host supports USB 3.0 SuperSpeed
[ 4.148328] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[ 4.157414] hub 2-0:1.0: USB hub found
[ 4.161248] hub 2-0:1.0: 1 port detected
[ 4.216961] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 4.234115] init: - preinit -
[ 5.322021] mtk_soc_eth 1e100000.ethernet eth0: configuring for fixed/rgmii link mode
[ 5.330461] mtk_soc_eth 1e100000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 5.338927] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 5.502723] random: jshn: uninitialized urandom read (4 bytes read)
[ 5.617180] random: jshn: uninitialized urandom read (4 bytes read)
[ 5.693185] random: jshn: uninitialized urandom read (4 bytes read)
[ 5.921892] mt7530 mdio-bus:1f lan1: configuring for phy/gmii link mode
[ 5.929036] 8021q: adding VLAN 0 to HW filter on device lan1
[ 8.034192] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[ 8.041703] IPv6: ADDRCONF(NETDEV_CHANGE): lan1: link becomes ready
[ 10.319100] jffs2: notice: (628) jffs2_build_xattr_subsystem: complete building xattr subsystem, 26 of xdatum (24 unchecked, 1 orphan) and 40 of xref (1 dead, 0 orphan) found.
[ 10.340452] mount_root: switching to jffs2 overlay
[ 10.354944] overlayfs: upper fs does not support tmpfile.
[ 10.370266] urandom-seed: Seeding with /etc/urandom.seed
[ 10.509163] mt7530 mdio-bus:1f lan1: Link is Down
[ 10.532376] procd: - early -
[ 10.535426] procd: - watchdog -
[ 11.143855] procd: - watchdog -
[ 11.148824] procd: - ubus -
[ 11.252666] urandom_read: 6 callbacks suppressed
[ 11.252679] random: ubusd: uninitialized urandom read (4 bytes read)
[ 11.307421] procd: - init -
[ 11.792967] random: crng init done
[ 11.917210] kmodloader: loading kernel modules from /etc/modules.d/*
[ 12.009759] Loading modules backported from Linux version v5.10.42-0-g65859eca4dff
[ 12.017411] Backport generated by backports.git v5.10.42-1-0-gbee5c545
[ 12.027410] urngd: v1.0.2 started.
[ 12.043085] xt_time: kernel timezone is -0000
[ 12.125916] mt7621-pci 1e140000.pcie: bus=1 slot=0 irq=25
[ 12.131347] pci 0000:00:00.0: enabling device (0006 -> 0007)
[ 12.137037] mt76x2e 0000:01:00.0: enabling device (0000 -> 0002)
[ 12.143354] mt76x2e 0000:01:00.0: ASIC revision: 76120044
[ 12.804365] mt76x2e 0000:01:00.0: ROM patch build: 20141115060606a
[ 12.815737] mt76x2e 0000:01:00.0: Firmware Version: 0.0.00
[ 12.821217] mt76x2e 0000:01:00.0: Build: 1
[ 12.825353] mt76x2e 0000:01:00.0: Build Time: 201507311614____
[ 12.853639] mt76x2e 0000:01:00.0: Firmware running!
[ 12.860668] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 12.886823] PPP generic driver version 2.4.2
[ 12.893104] NET: Registered protocol family 24
[ 12.913125] kmodloader: done loading kernel modules from /etc/modules.d/*
[ 19.263335] mtk_soc_eth 1e100000.ethernet eth0: Link is Down
[ 19.278411] mtk_soc_eth 1e100000.ethernet eth0: configuring for fixed/rgmii link mode
[ 19.286766] mtk_soc_eth 1e100000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[ 19.290612] mt7530 mdio-bus:1f lan1: configuring for phy/gmii link mode
[ 19.303056] 8021q: adding VLAN 0 to HW filter on device lan1
[ 19.311698] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 19.319108] br-lan: port 1(lan1) entered blocking state
[ 19.324488] br-lan: port 1(lan1) entered disabled state
[ 19.331352] device lan1 entered promiscuous mode
[ 19.336109] device eth0 entered promiscuous mode
[ 19.368112] mt7530 mdio-bus:1f lan2: configuring for phy/gmii link mode
[ 19.375793] 8021q: adding VLAN 0 to HW filter on device lan2
[ 19.385660] br-lan: port 2(lan2) entered blocking state
[ 19.390968] br-lan: port 2(lan2) entered disabled state
[ 19.398225] device lan2 entered promiscuous mode
[ 19.415822] mt7530 mdio-bus:1f lan3: configuring for phy/gmii link mode
[ 19.423128] 8021q: adding VLAN 0 to HW filter on device lan3
[ 19.432698] br-lan: port 3(lan3) entered blocking state
[ 19.438091] br-lan: port 3(lan3) entered disabled state
[ 19.450579] device lan3 entered promiscuous mode
[ 19.466685] mt7530 mdio-bus:1f lan4: configuring for phy/gmii link mode
[ 19.474142] 8021q: adding VLAN 0 to HW filter on device lan4
[ 19.482891] br-lan: port 4(lan4) entered blocking state
[ 19.488298] br-lan: port 4(lan4) entered disabled state
[ 19.496209] device lan4 entered promiscuous mode
[ 19.524099] mt7530 mdio-bus:1f wan: configuring for phy/gmii link mode
[ 19.531565] 8021q: adding VLAN 0 to HW filter on device wan
[ 21.202055] br-lan: port 5(wlan0) entered blocking state
[ 21.207419] br-lan: port 5(wlan0) entered disabled state
[ 21.213537] device wlan0 entered promiscuous mode
[ 21.394211] mt7530 mdio-bus:1f lan1: Link is Up - 100Mbps/Full - flow control off
[ 21.401736] br-lan: port 1(lan1) entered blocking state
[ 21.406978] br-lan: port 1(lan1) entered forwarding state
[ 21.413452] IPv6: ADDRCONF(NETDEV_CHANGE): br-lan: link becomes ready
[ 21.474235] mt7530 mdio-bus:1f lan2: Link is Up - 100Mbps/Full - flow control off
[ 21.481760] br-lan: port 2(lan2) entered blocking state
[ 21.487034] br-lan: port 2(lan2) entered forwarding state
[ 21.554163] mt7530 mdio-bus:1f lan4: Link is Up - 100Mbps/Full - flow control rx/tx
[ 21.856645] br-lan: port 4(lan4) entered blocking state
[ 21.861863] br-lan: port 4(lan4) entered forwarding state
[ 22.570137] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 22.577091] br-lan: port 5(wlan0) entered blocking state
[ 22.582409] br-lan: port 5(wlan0) entered forwarding state
[ 22.674173] mt7530 mdio-bus:1f wan: Link is Up - 1Gbps/Full - flow control rx/tx
[ 22.681593] IPv6: ADDRCONF(NETDEV_CHANGE): wan: link becomes ready