developer_switch: Change WaitFor to use old API.

ToT WaitFor has been moved to sync_utils but in 6509B it's still in test.utils.

BUG=none
TEST=none

Change-Id: Ie3211779e3ee560ad77fe530b67522f722e041f5
Reviewed-on: https://chromium-review.googlesource.com/242733
Tested-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Chun-ta Lin <itspeter@chromium.org>
Commit-Queue: Chun-ta Lin <itspeter@chromium.org>
Trybot-Ready: Chun-ta Lin <itspeter@chromium.org>
Tested-by: Chun-ta Lin <itspeter@chromium.org>
1 file changed