net: another last_rx round

Kill last_rx use in l2tp and two net drivers
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/cxgb4vf/sge.c

@@ -1520,7 +1520,6 @@ int t4vf_ethrx_handler(struct sge_rspq *rspq, const __be64 *rsp,
 	__skb_pull(skb, PKTSHIFT);
 	skb->protocol = eth_type_trans(skb, rspq->netdev);
 	skb_record_rx_queue(skb, rspq->idx);
-	skb->dev->last_rx = jiffies;                  /* XXX removed 2.6.29 */
 	pi = netdev_priv(skb->dev);
 	rxq->stats.pkts++;
 

drivers/net/pxa168_eth.c

@@ -848,7 +848,6 @@ static int rxq_process(struct net_device *dev, int budget)
 			skb->protocol = eth_type_trans(skb, dev);
 			netif_receive_skb(skb);
 		}
-		dev->last_rx = jiffies;
 	}
 	/* Fill RX ring with skb's */
 	rxq_refill(dev);

net/l2tp/l2tp_eth.c

@@ -144,7 +144,6 @@ static void l2tp_eth_dev_recv(struct l2tp_session *session, struct sk_buff *skb,
 	nf_reset(skb);
 
 	if (dev_forward_skb(dev, skb) == NET_RX_SUCCESS) {
-		dev->last_rx = jiffies;
 		dev->stats.rx_packets++;
 		dev->stats.rx_bytes += data_len;
 	} else