dt-bindings: pwm: imx: 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>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

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

@@ -9,6 +9,9 @@ title: Freescale i.MX PWM controller
 maintainers:
   - Philipp Zabel <p.zabel@pengutronix.de>
 
+allOf:
+  - $ref: pwm.yaml#
+
 properties:
   "#pwm-cells":
     description: |
@@ -59,7 +62,6 @@ properties:
     maxItems: 1
 
 required:
-  - "#pwm-cells"
   - compatible
   - reg
   - clocks

Documentation/devicetree/bindings/pwm/imx-tpm-pwm.yaml

@@ -13,6 +13,9 @@ description: |
   The TPM counter and period counter are shared between multiple
   channels, so all channels should use same period setting.
 
+allOf:
+  - $ref: pwm.yaml#
+
 properties:
   "#pwm-cells":
     const: 3
@@ -34,7 +37,6 @@ properties:
     maxItems: 1
 
 required:
-  - "#pwm-cells"
   - compatible
   - reg
   - clocks