net: altera: Fix use correct return type for ndo_start_xmit()

The method ndo_start_xmit() returns a value of type netdev_tx_t. Fix
the ndo function to use the correct type.
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/altera/altera_tse_main.c

@@ -554,7 +554,7 @@ static irqreturn_t altera_isr(int irq, void *dev_id)
  * physically contiguous fragment starting at
  * skb->data, for length of skb_headlen(skb).
  */
-static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t tse_start_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct altera_tse_private *priv = netdev_priv(dev);
 	unsigned int txsize = priv->tx_ring_size;
@@ -562,7 +562,7 @@ static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct tse_buffer *buffer = NULL;
 	int nfrags = skb_shinfo(skb)->nr_frags;
 	unsigned int nopaged_len = skb_headlen(skb);
-	enum netdev_tx ret = NETDEV_TX_OK;
+	netdev_tx_t ret = NETDEV_TX_OK;
 	dma_addr_t dma_addr;
 
 	spin_lock_bh(&priv->tx_lock);