9P: remove unnecessary break after return

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

net/9p/client.c

@@ -959,7 +959,6 @@ static int p9_client_version(struct p9_client *c)
 		break;
 	default:
 		return -EINVAL;
-		break;
 	}
 
 	if (IS_ERR(req))