fix: overide TNS5 with TNS100

Signed-off-by: Harsh Vardhan <[email protected]>

Author: openroadie

flow/designs/nangate45/aes/config.mk

@@ -8,4 +8,4 @@ export SDC_FILE      = ./designs/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.sdc
 export FLOORPLAN_DEF = ./designs/$(PLATFORM)/$(DESIGN_NICKNAME)/aes_ng45_fp.def
 
 export PLACE_DENSITY_LB_ADDON = 0.20
-export TNS_END_PERCENT ?= 100
+export TNS_END_PERCENT = 100