sw/vec: Renode config fix

This change fixes recent renode regression on vmvx test cases.

FIX: 329879100
Change-Id: I399ce6920d3c166a333ba5da394725d6dc199129
diff --git a/scripts/test_runner.py b/scripts/test_runner.py
index ea4350d..d7fe18a 100755
--- a/scripts/test_runner.py
+++ b/scripts/test_runner.py
@@ -124,8 +124,8 @@
 
         renode_script += """
 sysbus.cpu2 EnableExternalWindowMmu false
-start
-sysbus.vec_controlblock WriteDoubleWord 0xc 0"""
+sysbus.vec_controlblock WriteDoubleWord 0xc 0
+start"""
 
         trace_file = ""
         if args.trace_output: