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/arlan-main.c b/drivers/net/wireless/arlan-main.c
index d84caf1..d479f47 100644
--- a/drivers/net/wireless/arlan-main.c
+++ b/drivers/net/wireless/arlan-main.c
@@ -1193,7 +1193,7 @@
 
 	arlan_process_interrupt(dev);
 	ARLAN_DEBUG_EXIT("arlan_tx");
-	return 0;
+	return NETDEV_TX_OK;
 
 bad_end:
 	arlan_process_interrupt(dev);