efi_loader: correct handling of EFI binary return code
We should not try to remove protocol interfaces from a NULL handle.
efi_run_image() should always return the return code of the executed EFI
binary.
Fixes: 6422820ac3e5 ("efi_loader: split unrelated code from efi_bootmgr.c")
Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Ilias Apalodimas <[email protected]>