Add suffixes to some constants to avoid ambiguity

- `PSYCHIC` → `PSYCHIC_TYPE` (not the trainer `PSYCHIC_T` or the move `PSYCHIC_M`)
- `BLACKBELT` → `BLACKBELT_I` (not the trainer `BLACKBELT_T`)
- `CURSE_T` → `CURSE_TYPE` (not the move `CURSE`)
- `TOWN_MAP_D` → `TOWN_MAP_POSTER` (not the item `TOWN_MAP`)

This also uncovered a misidentified event: `EVENT_DECO_PLANT_4` → `EVENT_DECO_POSTER_1`. (There are three plants and four posters.)

constants/deco_constants.asm

@@ -13,7 +13,7 @@ const_value = 1
 	const MAGNAPLANT
 	const TROPICPLANT
 	const JUMBOPLANT
-	const TOWN_MAP_D
+	const TOWN_MAP_POSTER
 	const FAMICOM
 	const SUPER_NES
 	const NINTENDO_64