dt-bindings: pinctrl: qcom,sdm630: convert to dtschema

Convert Qualcomm SDM630 and SDM660 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').

Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221011190231.76784-4-krzysztof.kozlowski@linaro.org


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