Merge tag 'efi-2020-01-rc4' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2020-01-rc4

Fix errors due to unaligned memory access:
* disable UEFI except for ARMv8, ARMv7, ARM11
* enable unaligned access support on ARM11

Remove an unused function.