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: 9b36627a ("net: remove dev->trans_start")
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NFlorian Westphal <fw@strlen.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/tile/tilepro.c

@@ -2026,7 +2026,7 @@ static void tile_net_tx_timeout(struct net_device *dev)
 {
 	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);

drivers/s390/net/qeth_core_main.c

@@ -3481,7 +3481,7 @@ static void qeth_flush_buffers(struct qeth_qdio_out_q *queue, int index,
 		}
 	}
 
-	queue->card->dev->trans_start = jiffies;
+	netif_trans_update(queue->card->dev);
 	if (queue->card->options.performance_stats) {
 		queue->card->perf_stats.outbound_do_qdio_cnt++;
 		queue->card->perf_stats.outbound_do_qdio_start_time =