net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functions

This patch is the result of an automatic spatch transformation to convert
all ndo_start_xmit() return values of 0 to NETDEV_TX_OK.

Some occurences are missed by the automatic conversion, those will be
handled in a seperate patch.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/irda/pxaficp_ir.c b/drivers/net/irda/pxaficp_ir.c
index 3376a4f..e76a083 100644
--- a/drivers/net/irda/pxaficp_ir.c
+++ b/drivers/net/irda/pxaficp_ir.c
@@ -504,7 +504,7 @@
 			pxa_irda_set_speed(si, speed);
 		}
 		dev_kfree_skb(skb);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	netif_stop_queue(dev);
@@ -539,7 +539,7 @@
 
 	dev_kfree_skb(skb);
 	dev->trans_start = jiffies;
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static int pxa_irda_ioctl(struct net_device *dev, struct ifreq *ifreq, int cmd)