dt-bindings: Fix dt_binding_check errors in qcom,msm-buf

Only one top-level devicetree node can be defined per file; move
qcom,mem-buf-msgq to its own.

Fixes:
../Documentation/devicetree/bindings/soc/qcom/qcom,mem-buf.yaml:56:1:
[error] duplication of key "properties" in mapping (key-duplicates).

Change-Id: I8f7b5bdd94afa38ade3b2173ee2d99c6906cc74d
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>

bindings/soc/qcom/qcom,mem-buf-msgq.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/soc/qcom/qcom,mem-buf-msgq.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Qualcomm Technologies, Inc. Memory Buffer Sharing Msgq driver
+
+maintainers:
+  - Chris Goldsworthy
+
+description: |
+  Provides inter-VM message transfer services to the qcom,mem-buf driver
+
+properties:
+  compatible:
+    items:
+      - const: qcom,mem-buf-msgq
+
+additionalProperties: false
+
+required:
+  - compatible
+
+examples:
+  - |
+    qcom,mem-buf-msgq {
+        compatible = "qcom,mem-buf-msgq";
+    };

bindings/soc/qcom/qcom,mem-buf.yaml

@@ -4,7 +4,7 @@
 $id: "http://devicetree.org/schemas/soc/qcom/qcom,mem-buf.yaml#"
 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
 
-title: Qualcomm Technologies, Inc. Memory Buffer Sharing binding
+title: Qualcomm Technologies, Inc. Memory Buffer Sharing Driver
 
 maintainers:
   - Chris Goldsworthy
@@ -18,9 +18,12 @@ properties:
     items:
       - const: qcom,mem-buf
   qcom,vmid:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
     description: integer ID of the current virtual machine.
 
   qcom,mem-buf-capabilities:
+    $ref: '/schemas/types.yaml#/definitions/string'
+    description: One of supplier, consumer, or dual.
     oneOf:
       - const: supplier
         description:
@@ -39,6 +42,8 @@ properties:
           remote allocation requests, as well as request and accept memory
           from other VMs
 
+additionalProperties: false
+
 required:
   - compatible
   - qcom,mem-buf-capabilities
@@ -49,14 +54,3 @@ examples:
         compatible = "qcom,mem-buf";
         qcom,mem-buf-capabilities = "supplier";
     };
-
-description: |
-  Provides inter-VM message transfer services to the qcom,mem-buf driver
-
-properties:
-  compatible:
-    items:
-      - const: qcom,mem-buf-msgq
-
-required:
-  - compatible