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/arm/ether3.c b/drivers/net/arm/ether3.c
index 4550371..1f7a69c 100644
--- a/drivers/net/arm/ether3.c
+++ b/drivers/net/arm/ether3.c
@@ -511,7 +511,7 @@
 		dev_kfree_skb(skb);
 		priv(dev)->stats.tx_dropped ++;
 		netif_start_queue(dev);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	length = (length + 1) & ~1;
@@ -562,7 +562,7 @@
 		netif_stop_queue(dev);
 
  out:
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static irqreturn_t