Bluetooth: controller: consistent HCI error messages
Bluetooth: controller: consistent HCI error messages

Return BT_HCI_ERR_INVALID_CONN_ID if an invalid handle is
given by the HCI; currently sometimes BT_HCI_ERR_CMD_DISALLOWED
is returned

Signed-off-by: Andries Kruithof <51b9e94fd9719f930d9278e9897457f29ad12e15@nordicsemi.no>

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