dt-bindings: hwmon: add nxp,mc34vr500

Add dt-bindings for the NXP MC34VR500 PMIC.
Signed-off-by: Mario Kicherer <dev@kicherer.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230118123019.3041303-2-dev@kicherer.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/nxp,mc34vr500.yaml

+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/nxp,mc34vr500.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP MC34VR500 hwmon sensor
+
+maintainers:
+  - Mario Kicherer <dev@kicherer.org>
+
+properties:
+  compatible:
+    enum:
+      - nxp,mc34vr500
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      pmic@8 {
+        compatible = "nxp,mc34vr500";
+        reg = <0x08>;
+      };
+    };