net: nuvoton: w90p910_ether: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in w90p910_ether_start_xmit()
when skb xmit done. It makes drop profiles(dropwatch, perf) more
friendly.
Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/nuvoton/w90p910_ether.c

@@ -630,7 +630,7 @@ static int w90p910_ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	if (!(w90p910_send_frame(dev, skb->data, skb->len))) {
 		ether->skb = skb;
-		dev_kfree_skb_irq(skb);
+		dev_consume_skb_irq(skb);
 		return 0;
 	}
 	return -EAGAIN;