dt-bindings: pinctrl: qcom: Add support for ipq5018

Add device tree binding Documentation details for ipq5018
pinctrl driver.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Co-developed-by: Nitheesh Sekar <quic_nsekar@quicinc.com>
Signed-off-by: Nitheesh Sekar <quic_nsekar@quicinc.com>
Co-developed-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
Link: https://lore.kernel.org/r/20230608122152.3930377-4-quic_srichara@quicinc.com


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