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/throne_tracker.h

@@ -1,10 +1,10 @@
 #ifndef __KSU_H_THRONE_TRACKER
 #define __KSU_H_THRONE_TRACKER
 
-void ksu_throne_tracker_init();
+void ksu_throne_tracker_init(void);
 
-void ksu_throne_tracker_exit();
+void ksu_throne_tracker_exit(void);
 
-void track_throne();
+void track_throne(void);
 
 #endif