md: show journal for journal disk in disk state sysfs

Journal disk state sysfs entry should indicate it's journal
Signed-off-by: NShaohua Li <shli@fb.com>
Signed-off-by: NNeilBrown <neilb@suse.com>

drivers/md/md.c

@@ -2520,6 +2520,10 @@ state_show(struct md_rdev *rdev, char *page)
 		len += sprintf(page+len, "%sin_sync",sep);
 		sep = ",";
 	}
+	if (test_bit(Journal, &flags)) {
+		len += sprintf(page+len, "%sjournal",sep);
+		sep = ",";
+	}
 	if (test_bit(WriteMostly, &flags)) {
 		len += sprintf(page+len, "%swrite_mostly",sep);
 		sep = ",";