MLBED-2822 Added CLI-opt for weight size est.

Added --weight-estimation-scaling, which enables
additional scaling of weight compression scale estimate.

Signed-off-by: Patrik Gustavsson <patrik.gustavsson@arm.com>
Change-Id: Idcda41257f44901d3a3f345341e07fb1ae8585a9
diff --git a/ethosu/vela/test/testutil.py b/ethosu/vela/test/testutil.py
index 116afa4..68866fc 100644
--- a/ethosu/vela/test/testutil.py
+++ b/ethosu/vela/test/testutil.py
@@ -38,6 +38,7 @@
         global_memory_clock_scale=1.0,
         max_blockdep=0,
         softmax_support=True,
+        weight_estimation_scaling=1.0,
     )