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/pcmcia/axnet_cs.c b/drivers/net/pcmcia/axnet_cs.c
index 70fc959..a1a6b08 100644
--- a/drivers/net/pcmcia/axnet_cs.c
+++ b/drivers/net/pcmcia/axnet_cs.c
@@ -1005,7 +1005,7 @@
 {
 	long e8390_base = dev->base_addr;
 	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
-	int txsr, isr, tickssofar = jiffies - dev->trans_start;
+	int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
 	unsigned long flags;
 
 	dev->stats.tx_errors++;