VIRTIO: Use __skb_queue_purge()

Use standard routine for queue purging.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index f926b5a..fe7cdf2 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -470,8 +470,7 @@
 		kfree_skb(skb);
 		vi->num--;
 	}
-	while ((skb = __skb_dequeue(&vi->send)) != NULL)
-		kfree_skb(skb);
+	__skb_queue_purge(&vi->send);
 
 	BUG_ON(vi->num != 0);