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

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

Add an entry for the MT8186 based Steelix Chromebook, also known as the
Lenovo 300e Yoga 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/20240126083802.2728610-4-wenst@chromium.org
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>