drivers/pwm: stm32: use new pinctrl API

Use the new pinctrl API to configure pins.
Since STM32F1 series require pinctrl option and required register
address is parent timer address in place of own node register address,
use PINCTRL_DT_INST_CUSTOM_REG_DEFINE in place of usual
PINCTRL_DT_INST_DEFINE for this specific series.

Additionally, remove the automatic selection of PINMUX API.

Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
2 files changed