faft: Fix the new argument format on firmware_SoftwareSync test

To reflect the following change:
  https://gerrit.chromium.org/gerrit/33290

BUG=chromium-os:22598
TEST=run_remote_tests.sh --remote=$DUT SoftwareSync/control$

Change-Id: I5ef6f47b71271f7da77307907f845a8b787006a9
Reviewed-on: https://gerrit.chromium.org/gerrit/33421
Reviewed-by: Mike Truty <truty@chromium.org>
Commit-Ready: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
1 file changed