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/eepro.c b/drivers/net/eepro.c
index cc2ab64..71605d6 100644
--- a/drivers/net/eepro.c
+++ b/drivers/net/eepro.c
@@ -1145,7 +1145,7 @@
 
 	if (length < ETH_ZLEN) {
 		if (skb_padto(skb, ETH_ZLEN))
-			return 0;
+			return NETDEV_TX_OK;
 		length = ETH_ZLEN;
 	}
 	netif_stop_queue (dev);
@@ -1178,7 +1178,7 @@
 	eepro_en_int(ioaddr);
 	spin_unlock_irqrestore(&lp->lock, flags);
 
-	return 0;
+	return NETDEV_TX_OK;
 }