pinctrl: qcom: Add pinctrl driver for MSM8909

pinctrl: qcom: Add pinctrl driver for MSM8909

Make it possible to control pins using the TLMM block in the MSM8909 SoC
by adding the necessary definitions for GPIOs, groups and functions.

The driver is originally taken from the msm-4.9 release [1] from Qualcomm,
but cleaned up significantly with several fixes and clarifications.

[1]: https://git.codelinaro.org/clo/la/kernel/msm-4.9/-/blob/LF.UM.8.7-22500-8x09.0/drivers/pinctrl/qcom/pinctrl-msm8909.c

Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220628145502.4158234-3-stephan.gerhold@kernkonzept.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>