document record mixing

include/fldeff_80F9BCC.h

@@ -9,8 +9,8 @@
 
 void sub_80FA5E4(s16 id, s16 x, s16 y);
 void sub_80FA794(s16 x, s16 y);
-void sub_80FB00C(void);
-void sub_80FB074(void);
+void CreateRecordMixingSprite(void);
+void DestroyRecordMixingSprite(void);
 void overworld_poison_effect(void);
 bool8 sub_80FADE4(u16, u8);