drivers: i2c: telink_b91: replace Pinmux by Pinctrl
drivers: i2c: telink_b91: replace Pinmux by Pinctrl

Updated driver to use new Pinctrl driver.

Signed-off-by: Yuriy Vynnychek <a84feaeb1f754105d62c9a6971fe842c95d6cc94@telink-semi.com>

galak/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr