dt-bindings: pinctrl: qcom,qcs404: convert to dtschema

Convert Qualcomm QCS404 pin controller bindings to DT schema.  Keep the
parsing of pin configuration subnodes consistent with other Qualcomm
schemas (children named with '-state' suffix, their children with
'-pins').

Changes during conversion: add sdc1_rclk pins (used in qcs404-evb.dtsi).

Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221104161131.57719-2-krzysztof.kozlowski@linaro.org


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