split unused layout incbins, dump layouts table

asm/overworld.s

@@ -722,7 +722,7 @@ get_mapdata_header: @ 8055170
 	.align 2, 0
 _08055180: .4byte gSaveBlock1Ptr
 _08055184:
-	ldr r0, _08055194 @ =gUnknown_834EB8C
+	ldr r0, _08055194 @ =gMapLayouts
 	subs r1, 0x1
 	lsls r1, 2
 	adds r1, r0
@@ -731,7 +731,7 @@ _0805518E:
 	pop {r1}
 	bx r1
 	.align 2, 0
-_08055194: .4byte gUnknown_834EB8C
+_08055194: .4byte gMapLayouts
 	thumb_func_end get_mapdata_header
 
 	thumb_func_start warp_shift

asm/teachy_tv.s

@@ -2273,7 +2273,7 @@ sub_815BD80: @ 815BD80
 	str r0, [sp, 0x4]
 	movs r0, 0
 	str r0, [sp, 0x10]
-	ldr r1, _0815BE1C @ =gUnknown_82E55CC
+	ldr r1, _0815BE1C @ =gMapData_82E55CC
 	mov r8, r1
 	movs r0, 0x80
 	lsls r0, 4
@@ -2339,7 +2339,7 @@ _0815BDF0:
 	ldrh r0, [r6]
 	b _0815BE34
 	.align 2, 0
-_0815BE1C: .4byte gUnknown_82E55CC
+_0815BE1C: .4byte gMapData_82E55CC
 _0815BE20: .4byte 0x000003ff
 _0815BE24:
 	adds r0, r3, 0x1