Fix B_OAM_PRIO comment

Author: Rangi42

hardware.inc

@@ -967,7 +967,7 @@ def OAMA_X      rb ; 1
     def OAM_X_OFS equ  8 ; subtract 8 from what's written to OAM to get the real X position
 def OAMA_TILEID rb ; 2
 def OAMA_FLAGS  rb ; 3
-    def B_OAM_PRIO  equ 7 ; whether the OBJ is drawn above BG colors 1-3
+    def B_OAM_PRIO  equ 7 ; whether the OBJ is drawn below BG colors 1-3
     def B_OAM_YFLIP equ 6 ; whether the whole OBJ is flipped vertically
     def B_OAM_XFLIP equ 5 ; whether the whole OBJ is flipped horizontally
     def B_OAM_PAL1  equ 4 ; (DMG only) which of the two palettes the OBJ uses