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>
diff --git a/drivers/net/yellowfin.c b/drivers/net/yellowfin.c
index 7477ffd..3c7a505 100644
--- a/drivers/net/yellowfin.c
+++ b/drivers/net/yellowfin.c
@@ -717,7 +717,7 @@
 	if (yp->cur_tx - yp->dirty_tx < TX_QUEUE_SIZE)
 		netif_wake_queue (dev);		/* Typical path */
 
-	dev->trans_start = jiffies;
+	dev->trans_start = jiffies; /* prevent tx timeout */
 	dev->stats.tx_errors++;
 }
 
@@ -876,7 +876,6 @@
 		netif_start_queue (dev);		/* Typical path */
 	else
 		yp->tx_full = 1;
-	dev->trans_start = jiffies;
 
 	if (yellowfin_debug > 4) {
 		printk(KERN_DEBUG "%s: Yellowfin transmit frame #%d queued in slot %d.\n",