Commit 562d96128b introduces new variable "BOOT_SOC". This var is used at u-boot post install script, so "BOOT_SOC" must be avaiable on system image. Without this u-boot upgrade on tinkerboard will be completely broken. https://forum.armbian.com/topic/35677-tinkerboard-not-booting-after-updates/
562d96128b
rewrite-<uboot,kernel>-patches-needing-rebase