net: return operator cleanup

Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f7f1302..45dcda5b 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1676,7 +1676,7 @@
  */
 static inline int netif_is_multiqueue(const struct net_device *dev)
 {
-	return (dev->num_tx_queues > 1);
+	return dev->num_tx_queues > 1;
 }
 
 extern void netif_set_real_num_tx_queues(struct net_device *dev,