Openwrt 18.06 rc1 - Lantiq xway ( no wifi after sysupgrade )

After sysupgrade from 17.01.04 radio0 was not enabled/associated.

It was necessary to restart router to resolve.

Image:
https://downloads.openwrt.org/releases/18.06.0-rc1/targets/lantiq/xway/openwrt-18.06.0-rc1-lantiq-xway-netgear_dgn3500-squashfs-sysupgrade.bin

Still the same issue with 18.06 rc2

logread after sysupgrade 18.06 rc2 ( no wifi )

Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.874565] ath: EEPROM regdomain: 0x0
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.876932] ath: EEPROM indicates default country code should be used
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.883294] ath: doing EEPROM country->regdmn map search
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.888563] ath: country maps to regdmn code: 0x3a
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.893323] ath: Country alpha2 being used: US
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.897713] ath: Regpair used: 0x3a
Sun Jul 15 22:31:51 2018 kern.debug kernel: [  147.917312] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
Sun Jul 15 22:31:51 2018 kern.info kernel: [  147.928689] ieee80211 phy0: Atheros AR9280 Rev:2 mem=0xb8000000, irq=30

logread after reboot 18.06 rc2 ( wifi working )

Sun Jul 15 22:32:02 2018 kern.debug kernel: [   27.996294] ath: EEPROM regdomain: 0x0
Sun Jul 15 22:32:02 2018 kern.debug kernel: [   27.998591] ath: EEPROM indicates default country code should be used
Sun Jul 15 22:32:02 2018 kern.debug kernel: [   28.005033] ath: doing EEPROM country->regdmn map search
Sun Jul 15 22:32:02 2018 kern.debug kernel: [   28.010289] ath: country maps to regdmn code: 0x3a
Sun Jul 15 22:32:02 2018 kern.debug kernel: [   28.015031] ath: Country alpha2 being used: US
Sun Jul 15 22:32:02 2018 kern.debug kernel: [   28.019436] ath: Regpair used: 0x3a
...
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.648874] ath: EEPROM regdomain: 0x8024
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.651440] ath: EEPROM indicates we should expect a country code
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.657553] ath: doing EEPROM country->regdmn map search
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.662774] ath: country maps to regdmn code: 0x21
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.667525] ath: Country alpha2 being used: AU
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.671932] ath: Regpair used: 0x21
Sun Jul 15 22:32:07 2018 kern.debug kernel: [   33.675348] ath: regdomain 0x8024 dynamically updated by user