DT schema expects PMIC GPIO pin configuration nodes to be named with
'-state' suffix.  Optional children should be either 'pinconf' or
followed with '-pins' suffix.  This fixes dtbs_check warnings like:

  sdm845-xiaomi-beryllium.dtb: gpios@c000: 'vol-up-active' does not match any of the regexes: '-state$', 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220507194913.261121-6-krzysztof.kozlowski@linaro.org