Deprecate GBB flag RUNNING_FAFT

There is no correct use of this flag at any time, and FAFT
tests do not normally set this GBB flag when tests are running.

BUG=None
TEST=None

Change-Id: Ibfddb5e306fbbe1db6007534690ed6f73d89d734
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5708050
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: Jeremy Bettis <jbettis@chromium.org>
Commit-Queue: Julius Werner <jwerner@chromium.org>
Auto-Submit: Jeremy Bettis <jbettis@chromium.org>
2 files changed