dt-bindings: pinctrl: qcom,sm8250: add gpio-reserved-ranges and gpio-line-names

Document common GPIO properties (gpio-reserved-ranges and
gpio-line-names), already used on qrb5165-rb5 board.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221016172212.49105-12-krzysztof.kozlowski@linaro.org


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