depthcharge: introduce EC_EFS from coreboot

Introduce the EC_EFS option into vboot Kconfig,
set the option on appropriate devices, and check for
the option in order to set proper VBSD flags.

BUG=b:124141368, b:124192753, chromium:943511
TEST=Build and deploy to eve
TEST=/work/vboot/src/repohooks/pre-upload.py
BRANCH=none

Change-Id: I031c73ac060f6695a3fcfc521c3d7b15e1fa533d
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1523248
Commit-Ready: Joel Kitching <kitching@chromium.org>
Tested-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
3 files changed