dt-bindings: arm64: dts: mediatek: Add mt8183-kukui-kakadu

Kakadu is also known as ASUS Chromebook Detachable CM3.
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Link: https://lore.kernel.org/r/20210331091327.1198529-1-hsinyi@chromium.orgSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Documentation/devicetree/bindings/arm/mediatek.yaml

@@ -138,6 +138,12 @@ properties:
           - const: google,juniper-sku16
           - const: google,juniper
           - const: mediatek,mt8183
+      - description: Google Kakadu (ASUS Chromebook Detachable CM3)
+        items:
+          - const: google,kakadu-rev3
+          - const: google,kakadu-rev2
+          - const: google,kakadu
+          - const: mediatek,mt8183
       - items:
           - enum:
               - mediatek,mt8516-pumpkin