dt-bindings: leds: class-multicolor: reference class directly in multi-led node

The leds/common.yaml is referenced directly in each LED node, which
leads to people doing the same with leds/leds-class-multicolor.yaml.
This is not correct because leds-class-multicolor.yaml defined multi-led
property and its children.  Some schemas implemented this incorrect.

Rework this to match same behavior common.yaml, so expect the multi-led
node to reference the leds-class-multicolor.yaml.  Fixing allows to add
unevaluatedProperties:false.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml

@@ -33,6 +33,8 @@ patternProperties:
   "^multi-led@[0-9a-b]$":
     type: object
     $ref: leds-class-multicolor.yaml#
+    unevaluatedProperties: false
+
     description:
       This node represents one of the RGB LED devices on Turris Omnia.
       No subnodes need to be added for subchannels since this controller only

Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml

@@ -19,11 +19,10 @@ description: |
   LED class.  Common LED nodes and properties are inherited from the common.yaml
   within this documentation directory.
 
-patternProperties:
-  "^multi-led(@[0-9a-f])?$":
-    type: object
-    description: Represents the LEDs that are to be grouped.
 properties:
+  $nodename:
+    pattern: "^multi-led(@[0-9a-f])?$"
+
   color:
     description: |
       For multicolor LED support this property should be defined as either
@@ -31,11 +30,12 @@ patternProperties:
       include/linux/leds/common.h.
     enum: [ 8, 9 ]
 
-    $ref: "common.yaml#"
-
 required:
   - color
 
+allOf:
+  - $ref: "common.yaml#"
+
 additionalProperties: true
 
 ...

Documentation/devicetree/bindings/leds/leds-lp50xx.yaml

@@ -56,6 +56,8 @@ patternProperties:
   '^multi-led@[0-9a-f]$':
     type: object
     $ref: leds-class-multicolor.yaml#
+    unevaluatedProperties: false
+
     properties:
       reg:
         minItems: 1

Documentation/devicetree/bindings/leds/leds-pwm-multicolor.yaml

@@ -19,6 +19,8 @@ properties:
 
   multi-led:
     type: object
+    $ref: leds-class-multicolor.yaml#
+    unevaluatedProperties: false
 
     patternProperties:
       "^led-[0-9a-z]+$":
@@ -46,9 +48,6 @@ properties:
 required:
   - compatible
 
-allOf:
-  - $ref: leds-class-multicolor.yaml#
-
 additionalProperties: false
 
 examples:

Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml

@@ -58,6 +58,8 @@ properties:
   multi-led:
     type: object
     $ref: leds-class-multicolor.yaml#
+    unevaluatedProperties: false
+
     properties:
       "#address-cells":
         const: 1