mlxsw: switchx2: Set physical device for port netdevice

Do this so the sysfs has "device" link correctly set.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Reviewed-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/switchx2.c

@@ -968,6 +968,7 @@ static int mlxsw_sx_port_create(struct mlxsw_sx *mlxsw_sx, u8 local_port)
 	dev = alloc_etherdev(sizeof(struct mlxsw_sx_port));
 	if (!dev)
 		return -ENOMEM;
+	SET_NETDEV_DEV(dev, mlxsw_sx->bus_info->dev);
 	mlxsw_sx_port = netdev_priv(dev);
 	mlxsw_sx_port->dev = dev;
 	mlxsw_sx_port->mlxsw_sx = mlxsw_sx;