Merge tag 'efi-2021-04-rc3' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for efi-2021-04-rc3

Bug fixes:

* Let EFI simple file protocol access last block of partition
* Correct conversion of multi-part device paths in
  EFI_DEVICE_PATH_TO_TEXT_PROTOCOL.ConvertDevicePathToText()

Documentation:

* booti and qfw man-pages