ASoC: SOF: mediatek: mt8186: Add Google Steelix topology compatible

Add the machine compatible and topology filename for the Google Steelix
MT8186 Chromebook to load the correct SOF topology file.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231123084454.20471-1-angelogioacchino.delregno@collabora.com


Signed-off-by: Mark Brown <broonie@kernel.org>