dm delay: capitalize the start of an delay_ctr() error message

All other error messages start capitalized.
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

drivers/md/dm-delay.c

@@ -132,7 +132,7 @@ static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	int ret;
 
 	if (argc != 3 && argc != 6) {
-		ti->error = "requires exactly 3 or 6 arguments";
+		ti->error = "Requires exactly 3 or 6 arguments";
 		return -EINVAL;
 	}