AppArmor: Fix kernel-doc

security/apparmor/ipc.c:53: warning: expecting prototype for audit_cb(). Prototype was for audit_signal_cb() instead.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2337


Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>