dt-bindings: usb: mediatek: musb: add mt8516 compatbile

Add support mt8516 compatbile
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210201070016.41721-8-chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

@@ -17,6 +17,7 @@ properties:
   compatible:
     items:
       - enum:
+          - mediatek,mt8516-musb
           - mediatek,mt2701-musb
       - const: mediatek,mtk-musb