dt-bindings: pwm: google,cros-ec: include generic pwm schema

Include generic pwm.yaml schema, which enforces PWM node naming. Keep
the old name in bindings as deprecated.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Acked-by: Lee Jones <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

Documentation/devicetree/bindings/mfd/google,cros-ec.yaml

···
 
   ec-pwm:
     $ref: "/schemas/pwm/google,cros-ec-pwm.yaml#"
+    deprecated: true
+
+  pwm:
+    $ref: "/schemas/pwm/google,cros-ec-pwm.yaml#"
 
   keyboard-controller:
     $ref: "/schemas/input/google,cros-ec-keyb.yaml#"

Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.yaml

···
   An EC PWM node should be only found as a sub-node of the EC node (see
   Documentation/devicetree/bindings/mfd/google,cros-ec.yaml).
 
+allOf:
+  - $ref: pwm.yaml#
+
 properties:
   compatible:
     const: google,cros-ec-pwm
···
             compatible = "google,cros-ec-spi";
             reg = <0>;
 
-            cros_ec_pwm: ec-pwm {
+            cros_ec_pwm: pwm {
                 compatible = "google,cros-ec-pwm";
                 #pwm-cells = <1>;
             };