RGBDS syntax updates (#905)

New MACRO and DEF syntax

maps/GoldenrodUndergroundSwitchRoomEntrances.asm

@@ -1,13 +1,13 @@
 ; block ids
-UNDERGROUND_DOOR_CLOSED1 EQU $2a
-UNDERGROUND_DOOR_CLOSED2 EQU $3e
-UNDERGROUND_DOOR_CLOSED3 EQU $3f
-UNDERGROUND_DOOR_OPEN1   EQU $2d
-UNDERGROUND_DOOR_OPEN2   EQU $3d
+DEF UNDERGROUND_DOOR_CLOSED1 EQU $2a
+DEF UNDERGROUND_DOOR_CLOSED2 EQU $3e
+DEF UNDERGROUND_DOOR_CLOSED3 EQU $3f
+DEF UNDERGROUND_DOOR_OPEN1   EQU $2d
+DEF UNDERGROUND_DOOR_OPEN2   EQU $3d
 
-ugdoor: MACRO
-UGDOOR_\1_XCOORD EQU \2
-UGDOOR_\1_YCOORD EQU \3
+MACRO ugdoor
+	DEF UGDOOR_\1_XCOORD EQU \2
+	DEF UGDOOR_\1_YCOORD EQU \3
 ENDM
 
 	;      id,  x,  y
@@ -28,7 +28,7 @@ ENDM
 	ugdoor 15, 10, 18
 	ugdoor 16, 12, 18
 
-doorstate: MACRO
+MACRO doorstate
 	changeblock UGDOOR_\1_YCOORD, UGDOOR_\1_XCOORD, UNDERGROUND_DOOR_\2
 ENDM