ensure that kernel lockdown security is disabled per default to allow

third-party apps like wiringPi to allow to work again
(this fixes #2721).

buildroot-external/kernel/6.6/security.config

@@ -60,8 +60,8 @@ CONFIG_SECURITY_LANDLOCK=y
 
 # Enable "lockdown" LSM for bright line between the root user and kernel memory.
 CONFIG_SECURITY_LOCKDOWN_LSM=y
-CONFIG_SECURITY_LOCKDOWN_LSM_EARLY=y
-CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY=y
+# CONFIG_SECURITY_LOCKDOWN_LSM_EARLY is not set
+# CONFIG_LOCK_DOWN_KERNEL_FORCE_CONFIDENTIALITY is not set
 
 # Perform usercopy bounds checking. (And disable fallback to gain full whitelist enforcement.)
 CONFIG_HARDENED_USERCOPY=y
@@ -158,4 +158,4 @@ CONFIG_DEFAULT_SECURITY_APPARMOR=y
 # CONFIG_SECURITY_SELINUX is not set
 
 # Enable LSM security modules
-CONFIG_LSM="landlock,lockdown,yama,apparmor"
+CONFIG_LSM="landlock,yama,apparmor"