net: plip: fix plip_tx_packet()'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: David S. Miller <davem@davemloft.net>

drivers/net/plip/plip.c

@@ -142,7 +142,7 @@ static void plip_timer_bh(struct work_struct *work);
 static void plip_interrupt(void *dev_id);
 
 /* Functions for DEV methods */
-static int plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
+static netdev_tx_t plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
 static int plip_hard_header(struct sk_buff *skb, struct net_device *dev,
                             unsigned short type, const void *daddr,
 			    const void *saddr, unsigned len);
@@ -958,7 +958,7 @@ plip_interrupt(void *dev_id)
 	spin_unlock_irqrestore(&nl->lock, flags);
 }
 
-static int
+static netdev_tx_t
 plip_tx_packet(struct sk_buff *skb, struct net_device *dev)
 {
 	struct net_local *nl = netdev_priv(dev);