Document BCM63xx USBH PHY bindings.
Signed-off-by: NÁlvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200720131209.1236590-2-noltari@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>