e1000e: Increase Tx timeout factor for 10Mbps

Prevent Tx hangs from happening on 10Mb flood ping by increasing the
timeout factor.
Signed-off-by: NBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/net/e1000e/netdev.c

@@ -3058,7 +3058,7 @@ static void e1000_watchdog_task(struct work_struct *work)
 			case SPEED_10:
 				txb2b = 0;
 				netdev->tx_queue_len = 10;
-				adapter->tx_timeout_factor = 14;
+				adapter->tx_timeout_factor = 16;
 				break;
 			case SPEED_100:
 				txb2b = 0;