ASoC: dt-bindings: mediatek,mt8188-mt6359: add RT5682S support

Add compatible string "mediatek,mt8188-rt5682s" to support new board
with rt5682s codec.

Signed-off-by: xiazhengqiao <xiazhengqiao@huaqin.corp-partner.google.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231010023738.8241-2-xiazhengqiao@huaqin.corp-partner.google.com


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