Lower asap7/cva6 density more to speed up routing

Signed-off-by: Martin Povišer <povik@cutebit.org>

Author: povik

flow/designs/asap7/cva6/config.mk

@@ -91,7 +91,7 @@ export SDC_FILE               = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NAME)/constr
 export CORE_UTILIZATION       = 70
 export CORE_MARGIN            = 2
 export MACRO_PLACE_HALO       = 3 3
-export PLACE_DENSITY          = 0.67
+export PLACE_DENSITY          = 0.62
 
 # a smoketest for this option, there are a
 # few last gasp iterations