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/3c527.c b/drivers/net/3c527.c
index aaa8a9f..72b9ed7 100644
--- a/drivers/net/3c527.c
+++ b/drivers/net/3c527.c
@@ -1035,7 +1035,7 @@
 
 	if (skb_padto(skb, ETH_ZLEN)) {
 		netif_wake_queue(dev);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	atomic_dec(&lp->tx_count);
@@ -1066,7 +1066,7 @@
 	p->control     &= ~CONTROL_EOL;
 
 	netif_wake_queue(dev);
-	return 0;
+	return NETDEV_TX_OK;
 }