RGBDS syntax updates (#358)

New MACRO and DEF syntax

constants/gfx_constants.asm

@@ -1,33 +1,33 @@
-TILE_WIDTH EQU 8 ; pixels
-LEN_1BPP_TILE EQU 1 * TILE_WIDTH ; bytes
-LEN_2BPP_TILE EQU 2 * TILE_WIDTH ; bytes
+DEF TILE_WIDTH EQU 8 ; pixels
+DEF LEN_1BPP_TILE EQU 1 * TILE_WIDTH ; bytes
+DEF LEN_2BPP_TILE EQU 2 * TILE_WIDTH ; bytes
 
-SCREEN_WIDTH  EQU 20
-SCREEN_HEIGHT EQU 18
-SCREEN_WIDTH_PX  EQU SCREEN_WIDTH  * TILE_WIDTH ; pixels
-SCREEN_HEIGHT_PX EQU SCREEN_HEIGHT * TILE_WIDTH ; pixels
+DEF SCREEN_WIDTH  EQU 20
+DEF SCREEN_HEIGHT EQU 18
+DEF SCREEN_WIDTH_PX  EQU SCREEN_WIDTH  * TILE_WIDTH ; pixels
+DEF SCREEN_HEIGHT_PX EQU SCREEN_HEIGHT * TILE_WIDTH ; pixels
 
-BG_MAP_WIDTH  EQU 32 ; tiles
-BG_MAP_HEIGHT EQU 32 ; tiles
+DEF BG_MAP_WIDTH  EQU 32 ; tiles
+DEF BG_MAP_HEIGHT EQU 32 ; tiles
 
-SPRITEBUFFERSIZE EQU 7 * 7 * LEN_1BPP_TILE
+DEF SPRITEBUFFERSIZE EQU 7 * 7 * LEN_1BPP_TILE
 
 ; HP bar
-HP_BAR_GREEN  EQU 0
-HP_BAR_YELLOW EQU 1
-HP_BAR_RED    EQU 2
+DEF HP_BAR_GREEN  EQU 0
+DEF HP_BAR_YELLOW EQU 1
+DEF HP_BAR_RED    EQU 2
 
 ; wOAMBuffer
-NUM_SPRITE_OAM_STRUCTS EQU 40
+DEF NUM_SPRITE_OAM_STRUCTS EQU 40
 
 ; hAutoBGTransferEnabled
-TRANSFERTOP    EQU 0
-TRANSFERMIDDLE EQU 1
-TRANSFERBOTTOM EQU 2
+DEF TRANSFERTOP    EQU 0
+DEF TRANSFERMIDDLE EQU 1
+DEF TRANSFERBOTTOM EQU 2
 
 ; hRedrawRowOrColumnMode
-REDRAW_COL EQU 1
-REDRAW_ROW EQU 2
+DEF REDRAW_COL EQU 1
+DEF REDRAW_ROW EQU 2
 
 ; tile list ids
 ; TileIDListPointerTable indexes (see data/tilemaps.asm)
@@ -40,4 +40,4 @@ REDRAW_ROW EQU 2
 	const TILEMAP_GENGAR_INTRO_3
 	const TILEMAP_GAME_BOY
 	const TILEMAP_LINK_CABLE
-NUM_TILEMAPS EQU const_value
+DEF NUM_TILEMAPS EQU const_value