ath6kl: fix ath6kl_data_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 <luc.vanoostenryck@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath6kl/core.h

@@ -914,7 +914,7 @@ void ath6kl_tx_data_cleanup(struct ath6kl *ar);
 
 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar);
 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie);
-int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev);
+netdev_tx_t ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev);
 
 struct aggr_info *aggr_init(struct ath6kl_vif *vif);
 void aggr_conn_init(struct ath6kl_vif *vif, struct aggr_info *aggr_info,

drivers/net/wireless/ath/ath6kl/txrx.c

@@ -353,7 +353,7 @@ int ath6kl_control_tx(void *devt, struct sk_buff *skb,
 	return status;
 }
 
-int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
+netdev_tx_t ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
 {
 	struct ath6kl *ar = ath6kl_priv(dev);
 	struct ath6kl_cookie *cookie = NULL;