af_packet: remove a stray tab in packet_set_ring()

At first glance it looks like there is a missing curly brace but
actually the code works the same either way.  I have adjusted the
indenting but left the code the same.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/packet/af_packet.c

@@ -3804,7 +3804,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
 		 */
 			if (!tx_ring)
 				init_prb_bdqc(po, rb, pg_vec, req_u, tx_ring);
-				break;
+			break;
 		default:
 			break;
 		}