Make macro almost chip height

diff --git a/openlane/openram_testchip/config.tcl b/openlane/openram_testchip/config.tcl
index d421d77..e9e966a 100644
--- a/openlane/openram_testchip/config.tcl
+++ b/openlane/openram_testchip/config.tcl

@@ -14,7 +14,7 @@
 set ::env(CLOCK_PERIOD) "10"
 
 set ::env(FP_SIZING) absolute
-set ::env(DIE_AREA) "0 0 1000 2000"
+set ::env(DIE_AREA) "0 0 800 2900"
 set ::env(DESIGN_IS_CORE) 0
 
 set ::env(VDD_NETS) [list {vccd1} {vccd2} {vdda1} {vdda2}]
@@ -22,6 +22,7 @@
 
 #set ::env(FP_PIN_ORDER_CFG) $script_dir/pin_order.cfg
 
+#set ::env(SYNTH_NO_FLAT) 1
 set ::env(GLB_RT_ADJUSTMENT) 0.20
 set ::env(RUN_KLAYOUT_DRC) 0
 set ::env(PL_TARGET_DENSITY) 0.40