Revert renaming symbols in KernelSU driver

- In order to reduce the extra patch code and increase the rate of hunk succeed, we do not rename the symbols in KernelSU drvier but instead do it all in kernel/kallsym.c

- Make susfs_starts_with() global as it maybe useful in future

Co-authored-by: simonpunk <simonpunk2016@gmail.com>

kernel/throne_tracker.h

@@ -5,6 +5,6 @@ void ksu_throne_tracker_init();
 
 void ksu_throne_tracker_exit();
 
-void ksu_track_throne();
+void track_throne();
 
 #endif