dt-bindings: Add snapshot of remote debugger driver

The Remote Debugger driver allows a debugger running
on a host PC to communicate with a remotestub running
on peripheral subsystems.
This snapshot was taken as of msm-4.14 commit.

Change-Id: I30ef2c9b67904f80867df82552572978ab09a05c
Signed-off-by: Devender Kaushik <quic_dkaushik@quicinc.com>

bindings/arm/msm/qcom,rdbg-smp2p.yaml

@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+
+$id: http://devicetree.org/schemas/arm/msm/qcom,rdbg-smp2p.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Remote debugger driver
+
+maintainers:
+  - Devender Kaushik <quic_dkaushik@quicinc.com>
+
+description: |
+  The Remote Debug Driver interfaces with the Remote Debug stubs running on the
+   subsystem processors and does not drive or anage any hardware resources.
+
+properties:
+  compatible:
+    oneOf:
+       - description: To communicate with adsp
+         items:
+           - enum:
+               qcom,smp2p-interrupt-rdbg-2-in (inbound)
+               qcom,smp2p-interrupt-rdbg-2-out (outbound)
+
+       - description: To communicate with cdsp
+         items:
+           - enum:
+               qcom,smp2p-interrupt-rdbg-5-in (inbound)
+               qcom,smp2p-interrupt-rdbg-5-out (outbound)
+
+required:
+   - compatible
+
+examples:
+  -
+  qcom,smp2p_interrupt_rdbg_2_in {
+          compatible = "qcom,smp2p-interrupt-rdbg-2-in";
+  };
+