dt-bindings: input: Centralize 'linux,input-type' definition

Multiple bindings use 'linux,input-type', but there is not a central
definition and type. Add 'linux,input-type' to input.yaml and update all
the users to use it.

Signed-off-by: Rob Herring <[e-mail]>
Acked-by: Jeff LaBundy <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

Documentation/devicetree/bindings/input/azoteq,iqs7222.yaml

···
           linux,code: true
 
           linux,input-type:
-            $ref: /schemas/types.yaml#/definitions/uint32
             enum: [1, 5]
             default: 1
             description:

Documentation/devicetree/bindings/input/gpio-keys.yaml

···
           description: Key / Axis code to emit.
 
         linux,input-type:
-          description:
-            Specify event type this button/key generates. If not specified defaults to
-            <1> == EV_KEY.
-          $ref: /schemas/types.yaml#/definitions/uint32
-
-          default: 1
+          default: 1  # EV_KEY
 
         linux,input-value:
           description: |

Documentation/devicetree/bindings/input/input.yaml

···
     $ref: /schemas/types.yaml#/definitions/uint32
     maximum: 0x2ff
 
+  linux,input-type:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum:
+      - 1   # EV_KEY
+      - 2   # EV_REL
+      - 3   # EV_ABS
+      - 5   # EV_SW
+    description:
+      Specifies whether the event is to be interpreted as a key, relative,
+      absolute, or switch.
+
   poll-interval:
     description: Poll interval time in milliseconds.
     $ref: /schemas/types.yaml#/definitions/uint32
···
       Duration in seconds which the key should be kept pressed for device to
       reset automatically. Device with key pressed reset feature can specify
       this property.
+
+dependencies:
+  linux,input-type: [ "linux,code" ]
 
 additionalProperties: true

Documentation/devicetree/bindings/input/iqs626a.yaml

···
           linux,code: true
 
           linux,input-type:
-            $ref: /schemas/types.yaml#/definitions/uint32
             enum: [1, 5]
             description:
               Specifies whether the event is to be interpreted as a key (1) or
               a switch (5). By default, Hall-channel events are interpreted as
               switches and all others are interpreted as keys.
-
-        dependencies:
-          linux,input-type: ["linux,code"]
 
         additionalProperties: false