samples: adc: Add nucleo_wl55jc support
samples: adc: Add nucleo_wl55jc support

Add support for nucleo_wl55jc board to adc driver sample.

Signed-off-by: Alexander Mihajlovic <86f7e437faa5a7fce15d1ddcb9eaeaea377667b8@abxy.se>

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