efi_loader: fix relocation on x86_64

efi_loader: fix relocation on x86_64

Currently the relocation of the EFI runtime on x86_64 fails. This renders
the EFI subsystem unusable. The ELF relocation records for x86_64 contain
an addend field.

Always write the function name into error messages related to the EFI
runtime relocation.

Break an excessively long line.

Signed-off-by: Heinrich Schuchardt <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Tested-by: Bin Meng <[email protected]>
Signed-off-by: Bin Meng <[email protected]>
Signed-off-by: Alexander Graf <[email protected]>