dt-bindings: arm: mediatek: Add MT8188 Lenovo Chromebook Duet (11", 9)

Add entries for the MT8188-based Chromebook "Ciri", also known as
Lenovo Chromebook Duet (11", 9).

This device features a detachable design with touchscreen, detachable
keyboard and USI 2.0 Stylus support, and has 8 SKUs to accommodate the
combinations of second-source components.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Fei Shao <fshao@chromium.org>
Link: https://lore.kernel.org/r/20241124085739.290556-2-fshao@chromium.org


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>