dt-bindings: Add device-tree bindings for aon RSB driver

Add snapshot of device-tree bindings for AON RSB driver
and corresponding rpmsg driver from msm-5.15.c2 in YAML format.

Snapshot is taken from msm-5.15.c2 kernel commit 95ffcf910eee
("ARM: dts: msm: add aon-rma glink node").

Change-Id: I73bbb30403a488a053ba2b8a3aaf456190162506
Signed-off-by: Koushik Immadisetty <quic_kimmadis@quicinc.com>

bindings/soc/qcom/qcom,slate_rsb.yaml

@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,slate_rsb.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm technologies, Inc. slate-rsb
+
+maintainers:
+          - Praveen koya <quic_pkoya@quicinc.com>
+
+description: |
+  slate-rsb is used to communicate with Slate over Glink
+  to configure the RSB eventsslate-rsb send commands over glink to
+  send configure, enable/disable RSB to Slate
+
+properties:
+  compatible:
+    const: qcom,slate-rsb
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    qcom,slate-rsb {
+        compatible = "qcom,slate-rsb";
+    };

bindings/soc/qcom/qcom,slatersb_rpmsg.yaml

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/qcom/qcom,slatersb_rpmsg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm technologies, Inc. slatersb-rpmsg
+
+maintainers:
+  - Praveen koya <quic_pkoya@quicinc.com>
+
+description: |
+  slatersb-rpmsg is used as an interface between slate-rsb
+  and slate for Glink communication.slate-rsb is used to communicate with
+  Slate over Glink to configure the RSB events.
+
+properties:
+  compatible:
+    const: qcom,slatersb-rpmsg
+
+  qcom,glink-channels:
+    $ref: '/schemas/types.yaml#/definitions/string'
+    description: specifies the glink channel name
+
+  qcom,glinkpkt-edge:
+    $ref: '/schemas/types.yaml#/definitions/string'
+    description: specifies the glink edge to match
+
+  intents:
+    description: specifies the size and count of intents to glink
+
+required:
+  - compatible
+  - qcom,glink-channels
+  - qcom,glinkpkt-edge
+  - intents
+
+additionalProperties: false
+
+examples:
+  - |
+    qcom,slatersb-rpmsg {
+        compatible = "qcom,slatersb-rpmsg";
+        qcom,glink-channels = "RSB_CTRL";
+        qcom,glinkpkt-edge = "slate";
+        intents = <0x200 1>;
+    };