MT8173 with RT5650 RT5676 CODECS and HDMI via I2S

Required properties:
- compatible : "mediatek,mt8173-rt5650-rt5676"
- mediatek,audio-codec: the phandles of rt5650 and rt5676 codecs
			and of the hdmi encoder node
- mediatek,platform: the phandle of MT8173 ASoC platform

Example:

	sound {
		compatible = "mediatek,mt8173-rt5650-rt5676";
		mediatek,audio-codec = <&rt5650 &rt5676 &hdmi0>;
		mediatek,platform = <&afe>;
	};

