ARM: dts: msm: Add devicetree bindings for bootstat driver

Add the device tree binding for mpm sleep counter
so that it device nodes can be added for respective
SoC where it is supported.

Change-Id: Ic503641c25a4be7121cbf00ccffe103e641cd2f8
Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>

bindings/arm/msm/mpm_counter.yaml

@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/msm/mpm_counter.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MSM MPM sleep counter (mpm-v2)
+
+maintainers:
+  - Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>
+
+description: |
+  The MPM provides a timetick that starts when the device is powered up and
+  is not reset by any of the boot loaders or the HLOS. The MPM timetick counter
+  driver provides an api to get this value.
+
+properties:
+  compatible:
+    const: qcom,mpm2-sleep-counter
+
+  reg:
+    description: Specifies the physical address of the timetick count register.
+
+  clock-frequency:
+    description: the physical counter frequency.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    qcom,mpm2-sleep-counter@4a3000 {
+      compatible = "qcom,mpm2-sleep-counter";
+      reg = <0x4a3000 0x1000>;
+      clock-frequency = <32768>;
+    };
+