boards/arm/96b_wistrio: fix GPIO initialization code
boards/arm/96b_wistrio: fix GPIO initialization code

GPIO_OUTPUT_INIT_HIGH and GPIO_OUTPUT_INIT_LOW don't initialize pin
directions. Use correct initialization values.

Signed-off-by: Filip Kokosinski <15ac8876ac1a5305e50b11a5381cbe599b2262b1@antmicro.com>

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