net: convert remaining non-symbolic return values in ndo_start_xmit() functions

This patch converts the remaining occurences of raw return values to their
symbolic counterparts in ndo_start_xmit() functions that were missed by the
previous automatic conversion.

Additionally code that assumed the symbolic value of NETDEV_TX_OK to be zero
is changed to explicitly use NETDEV_TX_OK.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/wireless/wavelan_cs.c b/drivers/net/wireless/wavelan_cs.c
index 6af7064..9dd241a 100644
--- a/drivers/net/wireless/wavelan_cs.c
+++ b/drivers/net/wireless/wavelan_cs.c
@@ -3113,7 +3113,7 @@
 	 * able to detect collisions, therefore in theory we don't really
 	 * need to pad. Jean II */
 	if (skb_padto(skb, ETH_ZLEN))
-		return 0;
+		return NETDEV_TX_OK;
 
   wv_packet_write(dev, skb->data, skb->len);
 
@@ -3122,7 +3122,7 @@
 #ifdef DEBUG_TX_TRACE
   printk(KERN_DEBUG "%s: <-wavelan_packet_xmit()\n", dev->name);
 #endif
-  return(0);
+  return NETDEV_TX_OK;
 }
 
 /********************** HARDWARE CONFIGURATION **********************/