dt-bindings: pinctrl: qcom: Add support for IPQ9574

Add new binding document for pinctrl on IPQ9574

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Co-developed-by: Anusha Rao <quic_anusha@quicinc.com>
Signed-off-by: Anusha Rao <quic_anusha@quicinc.com>
Signed-off-by: Devi Priya <quic_devipriy@quicinc.com>
Link: https://lore.kernel.org/r/20230316072940.29137-4-quic_devipriy@quicinc.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>