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/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index c6485b3..21db749 100644
--- a/drivers/net/cxgb3/cxgb3_offload.c
+++ b/drivers/net/cxgb3/cxgb3_offload.c
@@ -64,7 +64,7 @@
 {
 	const struct adapter *adapter = tdev2adap(tdev);
 
-	return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
+	return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
 }
 
 /**