mlxsw: spectrum: Remove limitation regarding VID 1

VID 1 is not reserved anymore, so remove the check that prevented the
creation of VLAN devices with this VID over mlxsw ports.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -4992,11 +4992,6 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *lower_dev,
 			NL_SET_ERR_MSG_MOD(extack, "Can not put a VLAN on an OVS port");
 			return -EINVAL;
 		}
-		if (is_vlan_dev(upper_dev) &&
-		    vlan_dev_vlan_id(upper_dev) == 1) {
-			NL_SET_ERR_MSG_MOD(extack, "Creating a VLAN device with VID 1 is unsupported: VLAN 1 carries untagged traffic");
-			return -EINVAL;
-		}
 		break;
 	case NETDEV_CHANGEUPPER:
 		upper_dev = info->upper_dev;