security/apparmor/lsm.c: set debug messages

Add the _APPARMOR substring to reference the intended Kconfig option.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>

security/apparmor/lsm.c

@@ -681,7 +681,7 @@ module_param_named(hash_policy, aa_g_hash_policy, aabool, S_IRUSR | S_IWUSR);
 #endif
 
 /* Debug mode */
-bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_DEBUG_MESSAGES);
+bool aa_g_debug = IS_ENABLED(CONFIG_SECURITY_APPARMOR_DEBUG_MESSAGES);
 module_param_named(debug, aa_g_debug, aabool, S_IRUSR | S_IWUSR);
 
 /* Audit mode */