Merge tag 'efi-2022-01-rc4-3' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2022-01-rc4-3

Documentation:

* add Calxeda Highbank/Midway board documentation

Bug fixes:

* call part_init() in blk_get_device_by_str() only for MMC
* fix an 'undefined' error in some driver model macros