Merge tag 'efi-2020-04-rc4-4' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Merge tag 'efi-2020-04-rc4-4' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2020-04-rc4 (4)

This series fixes several bugs:

* consider the /reserved-memory node in the device tree
* consider memory reservations created in ft_board_setup()
* correct output of 'efidebug memmap' on the sandbox
* correct the definition of efi_capsule_header()

Furthermore some definitions needed for future patches are added to
header files.