net: Remove __skb_insert() calls outside of skbuff internals.

This minor cleanup simplifies later changes which will convert
struct sk_buff and friends over to using struct list_head.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index f1936d5..40ff6a9 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -2182,7 +2182,7 @@
 	 * do any additional locking here. stick the buffer
 	 * at the end.
 	 */
-	__skb_insert(skb, flow->prev, (struct sk_buff *) flow, flow);
+	__skb_queue_tail(flow, skb);
 	if (words[0] & RX_COMP1_RELEASE_FLOW) {
 		while ((skb = __skb_dequeue(flow))) {
 			cas_skb_release(skb);