dt-bindings: pinctrl: Add DT schema for qcom,msm8909-tlmm

Document the "qcom,msm8909-tlmm" compatible for the TLMM/pin control
block in the MSM8909 SoC, together with the allowed GPIOs and functions.

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220628145502.4158234-2-stephan.gerhold@kernkonzept.com


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