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/irda/sir_dev.c b/drivers/net/irda/sir_dev.c
index 1b051da..39d6e6f 100644
--- a/drivers/net/irda/sir_dev.c
+++ b/drivers/net/irda/sir_dev.c
@@ -336,7 +336,7 @@
 	if (!atomic_read(&dev->enable_rx))
 		return 0;
 
-	return (dev->rx_buff.state != OUTSIDE_FRAME);
+	return dev->rx_buff.state != OUTSIDE_FRAME;
 }
 
 int sirdev_set_dongle(struct sir_dev *dev, IRDA_DONGLE type)