drivers: gpio_pca95xx: add missing gpio_utils.h include
drivers: gpio_pca95xx: add missing gpio_utils.h include

Include gpio_utils.h to fix a build failure:

gpio_pca95xx.c:490:20: warning: implicit declaration of
 function 'GPIO_PORT_PIN_MASK_FROM_NGPIOS'
 [-Wimplicit-function-declaration]
gpio_pca95xx.c:490:20: error: initializer element is not constant
   .port_pin_mask = GPIO_PORT_PIN_MASK_FROM_NGPIOS(
    DT_INST_##inst##_NXP_PCA95XX_NGPIOS), \

Signed-off-by: Göran Weinholt <1d6afd615ba0d19ba976bc44509446dba50c2fb5@endian.se>

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