efi_loader: use %pUs for printing GUIDs

For printing GUIDs with macro EFI_ENTRY use %pUs instead of %pUl to provide
readable debug output.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c
index 8301eed..4463ae0 100644
--- a/lib/efi_loader/efi_capsule.c
+++ b/lib/efi_loader/efi_capsule.c
@@ -453,7 +453,7 @@
 				   image->update_hardware_instance,
 				   handles, no_handles);
 		if (!fmp) {
-			log_err("FMP driver not found for firmware type %pUl, hardware instance %lld\n",
+			log_err("FMP driver not found for firmware type %pUs, hardware instance %lld\n",
 				&image->update_image_type_id,
 				image->update_hardware_instance);
 			ret = EFI_UNSUPPORTED;
@@ -548,13 +548,13 @@
 			continue;
 		}
 
-		log_debug("Capsule[%d] (guid:%pUl)\n",
+		log_debug("Capsule[%d] (guid:%pUs)\n",
 			  i, &capsule->capsule_guid);
 		if (!guidcmp(&capsule->capsule_guid,
 			     &efi_guid_firmware_management_capsule_id)) {
 			ret  = efi_capsule_update_firmware(capsule);
 		} else {
-			log_err("Unsupported capsule type: %pUl\n",
+			log_err("Unsupported capsule type: %pUs\n",
 				&capsule->capsule_guid);
 			ret = EFI_UNSUPPORTED;
 		}