Bluetooth: Host: fix aes ccm authentication

Bluetooth Host calculated authentication value correctly only
for data smaller than 255 bytes. If data is larger then
authentication transformation used wrong flags.
Since the issue was symmetric two Zephyr
based devices were able to understand each other. Hence,
other devices like Android or IOS smartphones weren't able
to authenticate large frames and broke communication.

Signed-off-by: Aleksandr Khromykh <aleksandr.khromykh@nordicsemi.no>