Daybreak: support installing non-exfat update if only exfat firm is missing/corrupt

troposphere/daybreak/source/ams_su.h

@@ -29,6 +29,7 @@ typedef struct {
 
 typedef struct {
     Result result;
+    Result exfat_result;
     NcmContentMetaKey invalid_key;
     NcmContentId invalid_content_id;
 } AmsSuUpdateValidationInfo;