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>

drivers/net/myri10ge/myri10ge.c

@@ -2748,7 +2748,7 @@ again:
 				/* The packet is gone, so we must
 				 * return 0 */
 				ss->stats.tx_dropped += 1;
-				return 0;
+				return NETDEV_TX_OK;
 			}
 			/* adjust the len to account for the zero pad
 			 * so that the nic can know how long it is */
@@ -2892,7 +2892,7 @@ again:
 		tx->stop_queue++;
 		netif_tx_stop_queue(netdev_queue);
 	}
-	return 0;
+	return NETDEV_TX_OK;
 
 abort_linearize:
 	/* Free any DMA resources we've alloced and clear out the skb
@@ -2936,7 +2936,7 @@ abort_linearize:
 drop:
 	dev_kfree_skb_any(skb);
 	ss->stats.tx_dropped += 1;
-	return 0;
+	return NETDEV_TX_OK;
 
 }