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/tokenring/3c359.c b/drivers/net/tokenring/3c359.c
index b40b6de..1787d52 100644
--- a/drivers/net/tokenring/3c359.c
+++ b/drivers/net/tokenring/3c359.c
@@ -1240,7 +1240,7 @@
 
 		spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ; 
  
-		return 0;
+		return NETDEV_TX_OK;
 	} else {
 		spin_unlock_irqrestore(&xl_priv->xl_lock,flags) ; 
 		return NETDEV_TX_BUSY;