Make the map setup commands match the actual function names better

These functions used as map setup commands are used in other places,
too, so I can't prefix them under the same. The names should match
except I won't repeat "map" in a map setup command name.

engine/overworld/spawn_points.asm

@@ -1,6 +1,6 @@
 INCLUDE "data/maps/spawn_points.asm"
 
-LoadSpawnPoint:
+EnterMapSpawnPoint:
 	; loads the spawn point in wDefaultSpawnpoint
 	push hl
 	push de