ASoC: mediatek: mt8186: add misc driver and register definitions

Add mt8186 platform misc driver and data tables/register definitions files.

Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Link: https://lore.kernel.org/r/20220523132858.22166-14-jiaxin.yu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>