dt-bindings: pinctrl: qcom,pmic-gpio: add 'input-disable'

dt-bindings: pinctrl: qcom,pmic-gpio: add 'input-disable'

'input-disable' is already used and supported by common pinctrl
bindings, so add it also here to fix warnings like:

  arch/arm64/boot/dts/qcom/qrb5165-rb5.dtb: gpio@c000: lt9611-rst-state: 'oneOf' conditional failed, one must be fixed:
    'input-disable' does not match any of the regexes: 'pinctrl-[0-9]+'
    'function', 'input-disable', 'output-high', 'pins', 'power-source' do not match any of the regexes: '(pinconf|-pins)$', 'pinctrl-[0-9]+'

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220507194913.261121-5-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>