bluetooth: controller: Fix for coverity CID 203524
bluetooth: controller: Fix for coverity CID 203524

Fixes coverity issue: [Coverity CID :203524] Incorrect expression in
/subsys/bluetooth/controller/ticker/ticker.c #18382

Signed-off-by: Morten Priess <eeac701aa7fa64292a00ac226283761853032460@oticon.com>

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