mb/google/volteer: Add VBT data files for variants

Add data.vbt files for all variants supported by current volteer
recovery image. Several boards use the same VBT, so place the "common"
VBT under the baseboard directory and set it as the default.
For variants with a unique VBT, override the default and use the file in
their respective variant directory. Select INTEL_GMA_HAVE_VBT for all
variants which have a VBT file.

TEST=build/boot various volteer variants

Change-Id: I728ab81938c78f600ff8931a8073d1f7de152c09
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74852
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions