efi_loader: SetVirtualAddressMap() should return EFI_UNSUPPORTED

See UEFI specification 2.7, section 8.4.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 405f700..95844ef 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -284,7 +284,7 @@
 	}, {
 		/* invalidate_*cache_all are gone */
 		.ptr = &efi_runtime_services.set_virtual_address_map,
-		.patchto = &efi_invalid_parameter,
+		.patchto = &efi_unimplemented,
 	}, {
 		/* RTC accessors are gone */
 		.ptr = &efi_runtime_services.get_time,