net: dont update dev->trans_start

Second round of drivers for Gb cards (and NIU one I forgot in the 10GB round)

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Drivers can avoid one cache miss
(on dev->trans_start) in their start_xmit() handler.

Exceptions are NETIF_F_LLTX drivers

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igbvf/netdev.c

@@ -2270,7 +2270,6 @@ static int igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
 	if (count) {
 		igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
 		                   skb->len, hdr_len);
-		netdev->trans_start = jiffies;
 		/* Make sure there is space in the ring for the next send. */
 		igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
 	} else {