test: kernel: context: Add Renesas RCar CMT timer
test: kernel: context: Add Renesas RCar CMT timer

This test require explicit definition of the timer irq.

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

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