apparmor: fix kernel doc warnings for kernel test robot
Fix kernel doc warnings for the functions
- apparmor_socket_bind
- apparmor_unix_may_send
- apparmor_unix_stream_connect
- val_mask_to_str
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506070127.B1bc3da4-lkp@intel.com/
Signed-off-by: John Johansen <john.johansen@canonical.com>