carl9170: remove unnecessary break after return

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/wireless/ath/carl9170/phy.c

@@ -1139,7 +1139,6 @@ static int carl9170_set_freq_cal_data(struct ar9170 *ar,
 
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	for (; i >= 0; i--) {