Add load/slew scale option to config files

compiler/example_configs/example_config_freepdk45.py

@@ -7,8 +7,11 @@ process_corners = ["TT"]
 supply_voltages = [1.0]
 temperatures = [25]
 
-route_supplies = True
+route_supplies = False
 check_lvsdrc = True
+# nominal_corners_only = True
+load_scales = [0.5, 1, 4]
+slew_scales = [0.5, 1]
 
 output_path = "temp"
 output_name = "sram_{0}_{1}_{2}".format(word_size,