dt-bindings: dsp: mediatek: Add mt8188 dsp compatible

Add support of the single-core HiFi5 audio DSP on MediaTek MT8188 SoC
for pre- and post- audio processing.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230110084312.12953-2-tinghan.shen@mediatek.com


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