dt-bindings: usb: mtu3: add compatible for mt8186

Add a new compatible for mt8186 SoC.
Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
Link: https://lore.kernel.org/r/20221123135531.23221-2-allen-kh.cheng@mediatek.comAcked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/mediatek,mtu3.yaml

@@ -24,6 +24,7 @@ properties:
           - mediatek,mt2712-mtu3
           - mediatek,mt8173-mtu3
           - mediatek,mt8183-mtu3
+          - mediatek,mt8186-mtu3
           - mediatek,mt8188-mtu3
           - mediatek,mt8192-mtu3
           - mediatek,mt8195-mtu3