src/core1: reorganized header files

src/core2/code_AD5B0.c

@@ -1,12 +1,11 @@
 #include <ultra64.h>
+#include "core1/core1.h"
 #include "functions.h"
 #include "variables.h"
 
-#include <core1/viewport.h>
 #include "core2/anim/sprite.h"
 #include <core2/file.h>
 #include "core2/particle.h"
-#include "core1/eeprom.h"
 
 /* .data */
 extern u8 D_80370250 = 0;