packet: remove unnecessary break after return

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

net/packet/af_packet.c

@@ -3071,10 +3071,8 @@ static int packet_dev_mc(struct net_device *dev, struct packet_mclist *i,
 		break;
 	case PACKET_MR_PROMISC:
 		return dev_set_promiscuity(dev, what);
-		break;
 	case PACKET_MR_ALLMULTI:
 		return dev_set_allmulti(dev, what);
-		break;
 	case PACKET_MR_UNICAST:
 		if (i->alen != dev->addr_len)
 			return -EINVAL;