drivers: fix dev->trans_start removal fallout

kbuild test robot reported a build failure on s390.
While at it, also fix missing conversion in the tilera driver.

Fixes: 9b36627acecd5792 ("net: remove dev->trans_start")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/tile/tilepro.c b/drivers/net/ethernet/tile/tilepro.c
index 0bb98bc..922a443 100644
--- a/drivers/net/ethernet/tile/tilepro.c
+++ b/drivers/net/ethernet/tile/tilepro.c
@@ -2026,7 +2026,7 @@
 {
 	PDEBUG("tile_net_tx_timeout()\n");
 	PDEBUG("Transmit timeout at %ld, latency %ld\n", jiffies,
-	       jiffies - dev->trans_start);
+	       jiffies - dev_trans_start(dev));
 
 	/* XXX: ISSUE: This doesn't seem useful for us. */
 	netif_wake_queue(dev);