Merge tag 'efi-2024-04-rc1' of https://source.denx.de/u-boot/custodians/u-boot-efi

Pull request efi-2024-04-rc1

Documentation:

* update coreboot graphics documentation
* fix '---' rendering

UEFI:

* add missing pointer check after memory allocation in efidebug
* replace duplicate functions efi_dp_append and efi_dp_concat
* support fmp versioning for multi bank update
* avoid using dm_scan_other() in EFI app