kernel: expose KSU_LSM_SECURITY_HOOKS on Kconfig (#77)

disabling this removes the need for LSM_HOOK_INIT, security_add_hooks and such,.
furthermore, this will also allow easier integration on pre-4.1 kernels.
Expose this and make it a configurable option.

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

kernel/Kconfig

@@ -55,4 +55,12 @@ config KPM
 	  This option is suitable for scenarios where you need to force KPM to be enabled.
 	  but it may affect system stability.
 
+config KSU_LSM_SECURITY_HOOKS
+	bool "use lsm security hooks"
+        depends on KSU
+        default y
+	help
+	  Disabling this is mostly only useful for kernel 4.1 and older.
+	  Make sure to implement manual hooks on security/security.c.
+
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