Merge tag 'efi-next-20240611' of https://source.denx.de/u-boot/custodians/u-boot-efi into next

Pull request efi-next-20240611

UEFI:

* Allow specifying a device-tree in an EFI load option
  using the efidebug or eficonfig command.
* Let the EFI boot manager fall back to an OS provided device-tree
  if no device-tree is specified.