ASoC: SOF: mediatek: Add sof_mt8186_machs for mt8186

Add .of_machines field sof_mt8186_machs for mt8186

Signed-off-by: Chunxu Li <chunxu.li@mediatek.com>
Link: https://lore.kernel.org/r/20220805070449.6611-3-chunxu.li@mediatek.com


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