ASoC: mediatek: mt8188: add control for timing select

Add mixer control for irq and memif timing selection.
Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230116034131.23943-10-trevor.wu@mediatek.comSigned-off-by: Mark Brown <broonie@kernel.org>