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/arm/am79c961a.c b/drivers/net/arm/am79c961a.c
index 627bc75..164b37e 100644
--- a/drivers/net/arm/am79c961a.c
+++ b/drivers/net/arm/am79c961a.c
@@ -482,7 +482,7 @@
 
 	dev_kfree_skb(skb);
 
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 /*
diff --git a/drivers/net/arm/at91_ether.c b/drivers/net/arm/at91_ether.c
index 2e7419a..d46a06e 100644
--- a/drivers/net/arm/at91_ether.c
+++ b/drivers/net/arm/at91_ether.c
@@ -834,7 +834,7 @@
 				we free and return(0) or don't free and return 1 */
 	}
 
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 /*
diff --git a/drivers/net/arm/ether1.c b/drivers/net/arm/ether1.c
index edf770f..e47c0d9 100644
--- a/drivers/net/arm/ether1.c
+++ b/drivers/net/arm/ether1.c
@@ -748,7 +748,7 @@
 		netif_stop_queue(dev);
 
  out:
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static void
diff --git a/drivers/net/arm/ether3.c b/drivers/net/arm/ether3.c
index 4550371..1f7a69c 100644
--- a/drivers/net/arm/ether3.c
+++ b/drivers/net/arm/ether3.c
@@ -511,7 +511,7 @@
 		dev_kfree_skb(skb);
 		priv(dev)->stats.tx_dropped ++;
 		netif_start_queue(dev);
-		return 0;
+		return NETDEV_TX_OK;
 	}
 
 	length = (length + 1) & ~1;
@@ -562,7 +562,7 @@
 		netif_stop_queue(dev);
 
  out:
-	return 0;
+	return NETDEV_TX_OK;
 }
 
 static irqreturn_t