dt-bindings: usb: Add binding for TI USB8020B hub controller

The TI USB8020B is a USB 3.0 hub controller with 2 ports.

This initial version of the binding only describes USB related aspects
of the USB8020B, it does not cover the option of connecting the controller
as an i2c slave.

Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Link: https://lore.kernel.org/r/20240227090228.22156-1-macpaul.lin@mediatek.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>