usb: usb251xb: add usb data lane port swap feature

	struct device *dev = hub->dev;

	struct device_node *np = dev->of_node;

	int len, err, i;

	u32 property_u32 = 0;

	u32 port, property_u32 = 0;

	const u32 *cproperty_u32;

	const char *cproperty_char;

	char str[USB251XB_STRING_BUFSIZE / 2];

	struct property *prop;

	const __be32 *p;

	if (!np) {

		dev_err(dev, "failed to get ofdata\n");

			      (wchar_t *)hub->serial,

			      USB251XB_STRING_BUFSIZE);

	/*

	 * The datasheet documents the register as 'Port Swap' but in real the

	 * register controls the USB DP/DM signal swapping for each port.

	 */

	hub->port_swap = USB251XB_DEF_PORT_SWAP;

	of_property_for_each_u32(np, "swap-dx-lanes", prop, p, port) {

		if ((port >= 0) && (port <= data->port_cnt))

			hub->port_swap |= BIT(port);

	}

	/* The following parameters are currently not exposed to devicetree, but

	 * may be as soon as needed.

	 */

	hub->boost_up = USB251XB_DEF_BOOST_UP;

	hub->boost_57 = USB251XB_DEF_BOOST_57;

	hub->boost_14 = USB251XB_DEF_BOOST_14;

	hub->port_swap = USB251XB_DEF_PORT_SWAP;

	hub->port_map12 = USB251XB_DEF_PORT_MAP_12;

	hub->port_map34 = USB251XB_DEF_PORT_MAP_34;

	hub->port_map56 = USB251XB_DEF_PORT_MAP_56;