net/mlx4_en: Change log level from error to debug for vlan related messages

The port vlan table size is 126 (used for IBoE) so after 126 we will
not have space and the user need to see it only in debug print and not
error.
Signed-off-by: NAviad Yehezkel <aviadye@mellanox.com>
Reviewed-by: NYevgeny Petrilin <yevgenyp@mellanox.com>
Signed-off-by: NEugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: NAmir Vadai <amirv@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -405,7 +405,7 @@ static int mlx4_en_vlan_rx_add_vid(struct net_device *dev,
 			en_err(priv, "Failed configuring VLAN filter\n");
 	}
 	if (mlx4_register_vlan(mdev->dev, priv->port, vid, &idx))
-		en_err(priv, "failed adding vlan %d\n", vid);
+		en_dbg(HW, priv, "failed adding vlan %d\n", vid);
 	mutex_unlock(&mdev->state_lock);
 
 	return 0;
@@ -428,7 +428,7 @@ static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev,
 	if (!mlx4_find_cached_vlan(mdev->dev, priv->port, vid, &idx))
 		mlx4_unregister_vlan(mdev->dev, priv->port, idx);
 	else
-		en_err(priv, "could not find vid %d in cache\n", vid);
+		en_dbg(HW, priv, "could not find vid %d in cache\n", vid);
 
 	if (mdev->device_up && priv->port_up) {
 		err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);