dt-bindings: pinctrl: qcom: Add sm8750 pinctrl

Add documentation for the Qualcomm sm8750 tlmm.

Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/20241112002843.2804490-2-quic_molvera@quicinc.com


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