RGBDS syntax updates (#905)

New MACRO and DEF syntax

data/wild/fish.asm

@@ -1,6 +1,6 @@
-time_group EQUS "0," ; use the nth TimeFishGroups entry
+DEF time_group EQUS "0," ; use the nth TimeFishGroups entry
 
-fishgroup: MACRO
+MACRO fishgroup
 ; chance, old rod, good rod, super rod
 	db \1
 	dw \2, \3, \4

data/wild/probabilities.asm

@@ -1,4 +1,4 @@
-mon_prob: MACRO
+MACRO mon_prob
 ; percent, index
 	db \1, \2 * 2
 ENDM

data/wild/roammon_maps.asm

@@ -1,15 +1,15 @@
 ; Maps that roaming monsters can be on, and possible maps they can jump to.
 ; Notably missing are Route 40 and Route 41, which are water routes.
 
-roam_map: MACRO
+MACRO roam_map
 	map_id \1
 	db _NARG - 1
-rept _NARG - 1
-	map_id \2
-	shift
-endr
+	rept _NARG - 1
+		map_id \2
+		shift
+	endr
 	db 0
-list_index += 1
+	DEF list_index += 1
 ENDM
 
 RoamMaps:

data/wild/treemon_maps.asm

@@ -1,4 +1,4 @@
-treemon_map: MACRO
+MACRO treemon_map
 	map_id \1
 	db \2 ; treemon set
 ENDM

data/wild/unlocked_unowns.asm

@@ -1,4 +1,4 @@
-unown_set: MACRO
+MACRO unown_set
 rept _NARG
 	db UNOWN_\1
 	shift