ASoC: dt-bindings: qcom,q6core: Split to separate schema

The APR/GPR bindings with services got complicated so move out the
Q6Core service to its own binding. Previously the compatible was
documented in qcom,apr.yaml.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/qcom,q6core.yaml

···
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/qcom,q6core.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Audio Core (Q6Core)
+
+maintainers:
+  - Krzysztof Kozlowski <[e-mail]>
+  - Srinivas Kandagatla <[e-mail]>
+
+allOf:
+  - $ref: /schemas/soc/qcom/qcom,apr-services.yaml#
+
+properties:
+  compatible:
+    enum:
+      - qcom,q6core
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/soc/qcom,apr.h>
+
+    apr {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        service@3 {
+            compatible = "qcom,q6core";
+            reg = <APR_SVC_ADSP_CORE>;
+            qcom,protection-domain = "avs/audio", "msm/adsp/audio_pd";
+        };
+    };