drivers: intc_gicv3: use BIT64_MASK instead of BIT_MASK
drivers: intc_gicv3: use BIT64_MASK instead of BIT_MASK

On 32bit compiler the BIT_MASK(32) generate a warning,
after discussion on #42226 and #42163, advise was to use
BIT64_MASK instead.

Signed-off-by: Julien Massot <ad45d338e0f9dc7767e692227f7b2fcd41b31818@iot.bzh>

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