ASoC: dt-bindings: qcom,q6apm: Add SM8450 bedais node

On SM8450 and SC8280XP, the Q6APM is a bit different:
1. It is used as a platform DAI link, so it needs #sound-dai-cells.
2. It has two DAI children, so add new "bedais" node.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221115120235.167812-12-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/qcom,q6apm.yaml

@@ -18,14 +18,24 @@ properties:
     enum:
       - qcom,q6apm
 
+  bedais:
+    type: object
+    $ref: /schemas/sound/qcom,q6apm-lpass-dais.yaml#
+    unevaluatedProperties: false
+    description: Qualcomm DSP audio ports
+
   dais:
     type: object
     $ref: /schemas/sound/qcom,q6apm-dai.yaml#
     unevaluatedProperties: false
     description: Qualcomm DSP audio ports
 
+  '#sound-dai-cells':
+    const: 0
+
 required:
   - compatible
+  - bedais
   - dais
 
 unevaluatedProperties: false
@@ -41,11 +51,17 @@ examples:
         service@1 {
             reg = <GPR_APM_MODULE_IID>;
             compatible = "qcom,q6apm";
+            #sound-dai-cells = <0>;
             qcom,protection-domain = "avs/audio", "msm/adsp/audio_pd";
 
             dais {
                 compatible = "qcom,q6apm-dais";
                 iommus = <&apps_smmu 0x1801 0x0>;
             };
+
+            bedais {
+                compatible = "qcom,q6apm-lpass-dais";
+                #sound-dai-cells = <1>;
+            };
         };
     };