dt-bindings: pinctrl: qcom,sdm845-pinctrl: add GPIO hogs

Allow GPIO hogs in pin controller node.  qcom/sdm845-cheza.dtsi already
uses it.

Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221121081221.30745-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>