staging/wilc1000: fix wilc_mac_xmit()'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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_wlan.c

@@ -939,7 +939,7 @@ static void linux_wlan_tx_complete(void *priv, int status)
 	kfree(pv_data);
 }
 
-int wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
+netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
 {
 	struct wilc_vif *vif;
 	struct tx_complete_data *tx_data = NULL;

drivers/staging/wilc1000/wilc_wlan.h

@@ -298,7 +298,7 @@ void wilc_chip_sleep_manually(struct wilc *wilc);
 
 void wilc_enable_tcp_ack_filter(bool value);
 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc);
-int wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev);
+netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *dev);
 
 void wilc_wfi_p2p_rx(struct net_device *dev, u8 *buff, u32 size);
 void host_wakeup_notify(struct wilc *wilc);