dt-bindings: input: gpio-keys: accept also interrupt-extended

Each key device node might have interrupts-extended instead of
interrupts property:

  fsl-ls1028a-kontron-sl28-var1.dtb: buttons0: power-button: 'anyOf' conditional failed, one must be fixed:
    'interrupts' is a required property
    'gpios' is a required property
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220705120356.94876-4-krzysztof.kozlowski@linaro.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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

@@ -92,6 +92,8 @@ patternProperties:
     anyOf:
       - required:
           - interrupts
+      - required:
+          - interrupts-extended
       - required:
           - gpios