Bluetooth: controller: Add missing compilation guard
Bluetooth: controller: Add missing compilation guard

Add missing compilation guard for initialization of "force" flag in
ull_slave.

Signed-off-by: Wolfgang Puffitsch <f148e6efbb74c70a1ee845a87fa7616913a99a4b@demant.com>

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