firmware_FAFTSetup: Add recovery signal check

Dedicated recovery signal should be checked in spec checking mode.

BUG=chrome-os-partner:14649
TEST=Test passed on Link but failed with spec checking mode.

Change-Id: I6ecb56e11bdcf3afe8cf7e176863d8c54370f339
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/34492
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
2 files changed