batman-adv: fix batadv_interface_tx()'s return type

The method ndo_start_xmit() is defined as returning an 'netdev_tx_t',
which is a typedef for an enum type, but the implementation in this
driver returns an 'int'.

Fix this by returning 'netdev_tx_t' in this driver too.

Signed-off-by: Luc Van Oostenryck <[email protected]>
[[email protected]: fixed alignment]
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

Author: lucvoo

net/batman-adv/soft-interface.c

@@ -188,8 +188,8 @@ static void batadv_interface_set_rx_mode(struct net_device *dev)
 {
 }
 
-static int batadv_interface_tx(struct sk_buff *skb,
-			       struct net_device *soft_iface)
+static netdev_tx_t batadv_interface_tx(struct sk_buff *skb,
+				       struct net_device *soft_iface)
 {
 	struct ethhdr *ethhdr;
 	struct batadv_priv *bat_priv = netdev_priv(soft_iface);