Revert "usb: usb251xb: Add US port lanes inversion property"

This property isn't needed and not yet used anywhere. The swap-dx-lanes
property is perfectly fine for doing the swap on the upstream port
lanes.

CC: stable@vger.kernel.org #5.2
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://lore.kernel.org/r/20190719084407.28041-2-l.stach@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/misc/usb251xb.c

@@ -574,8 +574,6 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
 	hub->port_swap = USB251XB_DEF_PORT_SWAP;
 	usb251xb_get_ports_field(hub, "swap-dx-lanes", data->port_cnt,
 				 &hub->port_swap);
-	if (of_get_property(np, "swap-us-lanes", NULL))
-		hub->port_swap |= BIT(0);
 
 	/* The following parameters are currently not exposed to devicetree, but
 	 * may be as soon as needed.