kernel: fix -Wstrict-prototypes warnings/errors

* On newer kernel for some reason -Wno-strict-prototypes still does not fix the errors or warnings.
* To fix it, we just need to add void type.

Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>

kernel/kernel_compat.c

@@ -61,7 +61,7 @@ static bool android_context_saved_checked = false;
 static bool android_context_saved_enabled = false;
 static struct ksu_ns_fs_saved android_context_saved;
 
-void ksu_android_ns_fs_check()
+void ksu_android_ns_fs_check(void)
 {
 	if (android_context_saved_checked)
 		return;