test: vbe: Fix the ut-flag order in vbe_test_fixup_norun()

Move the -f flag before the suite name since ut parses flags
before the suite argument.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>

test/py/tests/test_vbe.py

@@ -87,7 +87,7 @@ bootm loados
 bootm prep
 fdt addr
 fdt print
-ut bootstd -f vbe_test_fixup_norun
+ut -f bootstd vbe_test_fixup_norun
 '''
 
 @pytest.mark.boardspec('sandbox')