arm64: dts: mediatek: Add MT8186 Ponyta Chromebooks

MT8186 ponyta, known as huaqin custom label, is a
MT8186 based laptop. It is based on the "corsola" design.
It includes LTE, touchpad combinations.

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Jianeng Ceng <cengjianeng@huaqin.corp-partner.google.com>
Link: https://lore.kernel.org/r/20250424010850.994288-3-cengjianeng@huaqin.corp-partner.google.com


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