Your the pioneer... you tell us 
Nice to see the kernel firing up! Try higher debug levels...
Although you loaded the "on-device" tree blob into memory via uboot... i doubt an initramfs will honour this as it has one pre appended within itself. Even if it did... it's format is likely not what 4.14 expects.... You have to edit the .dts within the buildroot... ( assuming you have not edited it already )....
Not alot of junk to investigate in reverse tho'
[ 0.009912] [Firmware Info]: /ocp@f1000000/ethernet-controller@72000/ethernet0-port@0: local-mac-address is not set
[ 0.014116] No ATAGs?
( partition definitions? )
[ 1.085180] mdio_bus f1072004.mdio-bus-mii: MDIO device at address 0 is missing.
[ 1.407896] ata1: SATA link down (SStatus 0 SControl F300)
[ 2.246569] rtc-mv f1010300.rtc: internal RTC not ticking