servod: scarlet: bypass wait-ext functionality

power_state:rec uses a regex to see if wait-ext is implemented.
However, Scarlet claims to implement this but doesn't.

BUG=b:77829289
TEST=test_that platform_ServoPowerStateController_USBPluggedin

Change-Id: I9b9dbc333a0171be84ebbfeac0c760789fdfedb9
Reviewed-on: https://chromium-review.googlesource.com/1011103
Commit-Ready: Nick Sanders <nsanders@chromium.org>
Tested-by: Nick Sanders <nsanders@chromium.org>
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
2 files changed