arm64: dts: mediatek: Add MT8186 Chinchou Chromebooks

MT8186 chinchou, known as ASUS Chromebook CZ12 Flip (CZ1204F)
and CZ12(CZ1204C), is a MT8186 based laptop.
It is based on the "corsola" design.It includes chinchou and chinchou360,
including LTE, stylus, touchscreen combinations.

Signed-off-by: Zhengqiao Xia <xiazhengqiao@huaqin.corp-partner.google.com>
Link: https://lore.kernel.org/r/20241212062046.22509-3-xiazhengqiao@huaqin.corp-partner.google.com


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