dt-bindings: pwm: rockchip: Include generic PWM schema

Include generic pwm.yaml schema, which enforces PWM node naming and
brings pwm-cells requirement.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml

@@ -51,42 +51,44 @@ properties:
 required:
   - compatible
   - reg
-  - "#pwm-cells"
 
-if:
-  properties:
-    compatible:
-      contains:
-        enum:
-          - rockchip,rk3328-pwm
-          - rockchip,rv1108-pwm
+allOf:
+  - $ref: pwm.yaml#
 
-then:
-  properties:
-    clocks:
-      items:
-        - description: Used to derive the functional clock for the device.
-        - description: Used as the APB bus clock.
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - rockchip,rk3328-pwm
+              - rockchip,rv1108-pwm
 
-    clock-names:
-      items:
-        - const: pwm
-        - const: pclk
+    then:
+      properties:
+        clocks:
+          items:
+            - description: Used to derive the functional clock for the device.
+            - description: Used as the APB bus clock.
 
-  required:
-    - clocks
-    - clock-names
+        clock-names:
+          items:
+            - const: pwm
+            - const: pclk
 
-else:
-  properties:
-    clocks:
-      maxItems: 1
-      description:
-        Used both to derive the functional clock
-        for the device and as the bus clock.
+      required:
+        - clocks
+        - clock-names
 
-  required:
-    - clocks
+    else:
+      properties:
+        clocks:
+          maxItems: 1
+          description:
+            Used both to derive the functional clock
+            for the device and as the bus clock.
+
+      required:
+        - clocks
 
 additionalProperties: false