dt-bindings: usb: mediatek,mtu3: add binding for MT8195 SoC

Add binding to support the mtu3 driver on the MT8195 SoC.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Macpaul Lin <macpaul.lin@mediatek.com>
Link: https://lore.kernel.org/r/20220426134106.242353-2-fparent@baylibre.com


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