megaboom: reduce floorplan to 1500x1500

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

Author: oharboe

BUILD.bazel

@@ -392,8 +392,8 @@ BOOMTILE_VARIABLES = SKIP_REPORT_METRICS | FAST_BUILD_SETTINGS | {
     "MIN_ROUTING_LAYER": "M2",
     "MAX_ROUTING_LAYER": "M7",
     "ROUTING_LAYER_ADJUSTMENT": "0.45",
-    "DIE_AREA": "0 0 2000 2000",
-    "CORE_AREA": "2 2 1998 1998",
+    "DIE_AREA": "0 0 1500 1500",
+    "CORE_AREA": "2 2 1498 1498",
     # Saves hours of build time, specific to BoomTile
     "SKIP_LAST_GASP": "1",
     "SETUP_SLACK_MARGIN": "-1300",