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/wireless/atmel.c b/drivers/net/wireless/atmel.c
index 291a94b..05813bc 100644
--- a/drivers/net/wireless/atmel.c
+++ b/drivers/net/wireless/atmel.c
@@ -793,13 +793,13 @@
 	    !(*priv->present_callback)(priv->card)) {
 		dev->stats.tx_errors++;
 		dev_kfree_skb(skb);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	if (priv->station_state != STATION_STATE_READY) {
 		dev->stats.tx_errors++;
 		dev_kfree_skb(skb);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	/* first ensure the timer func cannot run */
@@ -856,7 +856,7 @@
 	spin_unlock_bh(&priv->timerlock);
 	dev_kfree_skb(skb);
 
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static void atmel_transmit_management_frame(struct atmel_private *priv,