armhf: New target to build generic UEFI images for all armhf boards
Tested on A20-OLinuXino-Lime2 Rev.K with BAY-HDD with u-boot on SD card and FreedomBox on HDD.
Tested on A20-OLinuXino-Lime2 Rev.K with BAY-HDD with u-boot on SD card and FreedomBox on HDD.