dt-bindings: gpio: simplify GPIO hog nodes schema

The core schema in dtschema already strictly defines contents of nodes
with "gpio-hog" property (with additionalProperties: false), thus the
only thing device schema should do is: define "type: object" and
required "gpio-hog".  Make the code a bit simpler by removing redundant
parts.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240828-dt-bindings-gpio-hog-v1-3-63b83e47d804@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml

@@ -36,19 +36,8 @@ properties:
 patternProperties:
   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
     type: object
-
-    properties:
-      gpio-hog: true
-      gpios: true
-      output-high: true
-      output-low: true
-      line-name: true
-
     required:
       - gpio-hog
-      - gpios
-
-    additionalProperties: false
 
 required:
   - compatible

Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml

@@ -85,19 +85,8 @@ properties:
 patternProperties:
   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
     type: object
-    properties:
-      gpio-hog: true
-      gpios: true
-      input: true
-      output-high: true
-      output-low: true
-      line-name: true
-
     required:
       - gpio-hog
-      - gpios
-
-    additionalProperties: false
 
 required:
   - compatible

Documentation/devicetree/bindings/gpio/gpio-pca95xx.yaml

@@ -107,19 +107,8 @@ properties:
 patternProperties:
   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
     type: object
-    properties:
-      gpio-hog: true
-      gpios: true
-      input: true
-      output-high: true
-      output-low: true
-      line-name: true
-
     required:
       - gpio-hog
-      - gpios
-
-    additionalProperties: false
 
 required:
   - compatible

Documentation/devicetree/bindings/gpio/microchip,mpfs-gpio.yaml

@@ -49,20 +49,8 @@ properties:
 patternProperties:
   "^.+-hog(-[0-9]+)?$":
     type: object
-
-    additionalProperties: false
-
-    properties:
-      gpio-hog: true
-      gpios: true
-      input: true
-      output-high: true
-      output-low: true
-      line-name: true
-
     required:
       - gpio-hog
-      - gpios
 
 allOf:
   - if:

Documentation/devicetree/bindings/gpio/socionext,uniphier-gpio.yaml

@@ -55,19 +55,8 @@ properties:
 patternProperties:
   "^.+-hog(-[0-9]+)?$":
     type: object
-    properties:
-      gpio-hog: true
-      gpios: true
-      input: true
-      output-high: true
-      output-low: true
-      line-name: true
-
     required:
       - gpio-hog
-      - gpios
-
-    additionalProperties: false
 
 required:
   - compatible