drivers/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/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 822f586..2a47c1d 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -252,7 +252,7 @@
  */
 static inline int __port_is_enabled(struct port *port)
 {
-	return(port->slave->state == BOND_STATE_ACTIVE);
+	return port->slave->state == BOND_STATE_ACTIVE;
 }
 
 /**