net: trans_start cleanups

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/seeq8005.c b/drivers/net/seeq8005.c
index 374832c..11ab32e 100644
--- a/drivers/net/seeq8005.c
+++ b/drivers/net/seeq8005.c
@@ -390,7 +390,7 @@
 		   tx_done(dev) ? "IRQ conflict" : "network cable problem");
 	/* Try to restart the adaptor. */
 	seeq8005_init(dev, 1);
-	dev->trans_start = jiffies;
+	dev->trans_start = jiffies; /* prevent tx timeout */
 	netif_wake_queue(dev);
 }
 
@@ -411,7 +411,6 @@
 	netif_stop_queue(dev);
 
 	hardware_send_packet(dev, buf, length);
-	dev->trans_start = jiffies;
 	dev->stats.tx_bytes += length;
 	dev_kfree_skb (skb);
 	/* You might need to clean up and record Tx statistics here. */