ASoC: dt-bindings: realtek,rt5682s: Add AVDD and MICVDD supplies

The rt5682s codec has two supplies - AVDD and MICVDD - which are already
used by sc7180-trogdor-kingoftown.dtsi. Document them in the binding.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20221102182002.255282-2-nfraprado@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/realtek,rt5682s.yaml

@@ -90,11 +90,20 @@ properties:
   "#sound-dai-cells":
     const: 1
 
+  AVDD-supply:
+    description: Regulator supplying analog power through the AVDD pin.
+
+  MICVDD-supply:
+    description: Regulator supplying power for the microphone bias through the
+      MICVDD pin.
+
 additionalProperties: false
 
 required:
   - compatible
   - reg
+  - AVDD-supply
+  - MICVDD-supply
 
 examples:
   - |
@@ -120,5 +129,8 @@ examples:
 
             clocks = <&osc>;
             clock-names = "mclk";
+
+            AVDD-supply = <&avdd_reg>;
+            MICVDD-supply = <&micvdd_reg>;
         };
     };