dt-bindings: arm: mediatek: Add MT8186 Rusty Chromebook

Add an entry for the MT8186 based Rusty Chromebook, also known as the
Lenovo 100e Chromebook Gen 4.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240126083802.2728610-5-wenst@chromium.org


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