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/appletalk/ipddp.c b/drivers/net/appletalk/ipddp.c
index 78cea5e..6cfd961 100644
--- a/drivers/net/appletalk/ipddp.c
+++ b/drivers/net/appletalk/ipddp.c
@@ -132,7 +132,7 @@
         }
         if(rt == NULL) {
 		spin_unlock(&ipddp_route_lock);
-                return 0;
+                return NETDEV_TX_OK;
 	}
 
         our_addr = atalk_find_dev_addr(rt->dev);
@@ -181,7 +181,7 @@
 
 	spin_unlock(&ipddp_route_lock);
 
-        return 0;
+        return NETDEV_TX_OK;
 }
 
 /*