net: wan: sbni: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in send_complete() 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/wan/sbni.c

@@ -761,7 +761,7 @@ send_complete( struct net_device *dev )
 	dev->stats.tx_packets++;
 	dev->stats.tx_bytes += nl->tx_buf_p->len;
 #endif
-	dev_kfree_skb_irq( nl->tx_buf_p );
+	dev_consume_skb_irq(nl->tx_buf_p);
 
 	nl->tx_buf_p = NULL;