faft: Deprecate FAFT config keyboard_dev

The new config mode_switcher_type replaces it. Change all tests to
use mode_switcher_type instead.

BUG=chrome-os-partner:39744
TEST=Ran firmware_DevTriggerRecovery on Samus and Whirlwind.

Change-Id: I14d563e4e87307be858ba661ac0046435983f91d
Reviewed-on: https://chromium-review.googlesource.com/272434
Tested-by: Tom Tam <waihong@google.com>
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
Commit-Queue: Tom Tam <waihong@google.com>
14 files changed