net/mlx4_en: Remove dependency between timestamping capability and service_task

Service task is responsible for other tasks in addition to timestamping
overflow check. Launch it even if timestamping is not supported by device.

Fixes: 07841f9d ('net/mlx4_en: Schedule napi when RX buffers allocation fails')
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

@@ -3058,9 +3058,8 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
 	}
 	queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
 
-	if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
-		queue_delayed_work(mdev->workqueue, &priv->service_task,
-				   SERVICE_TASK_DELAY);
+	queue_delayed_work(mdev->workqueue, &priv->service_task,
+			   SERVICE_TASK_DELAY);
 
 	mlx4_en_set_stats_bitmap(mdev->dev, &priv->stats_bitmap,
 				 mdev->profile.prof[priv->port].rx_ppp,