pinctrl: qcom: add driver for SM8150 SoC

Add pinctrl and GPIO driver for SM8150. Driver code is based on the
similar U-Boot drivers. All constants are taken from the corresponding
Linux driver. This drivers differs from the similar U-Boot drivers,
because SM8150 SoC have different function IDs for the same functions
on different pins.

Co-authored-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Signed-off-by: Julius Lehmann <lehmanju@devpi.de>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>