arm64: dts: mt8183: Add kukui katsu board

katsu is also known as ASUS Chromebook Detachable CZ1.

Let katsu and kakadu set its own touchscreen and panel compatible. Remove
these setting from the common dtsi for readability.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>