Bluetooth: SMP: fix for bt fixed passkey BT_PASSKEY_INVALID
Bluetooth: SMP: fix for bt fixed passkey BT_PASSKEY_INVALID

when BT_PASSKEY_INVALID was set, it never updated the fixed
passkey which made its use ineffective

Signed-off-by: Faisal Saleem <f53b03a851580e42b92958a332e4dd99d76e9edd@setec.com.au>

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