Label remaining region_map symbols

include/region_map.h

@@ -111,7 +111,7 @@ void PokedexAreaScreen_UpdateRegionMapVariablesAndVideoRegs(s16 x, s16 y);
 void CB2_OpenFlyMap(void);
 bool8 IsRegionMapZoomed(void);
 void TrySetPlayerIconBlink(void);
-void sub_8123030(u16 color, u32 coeff);
+void BlendRegionMap(u16 color, u32 coeff);
 void SetRegionMapDataForZoom(void);
 
 extern const struct RegionMapLocation gRegionMapEntries[];