mb/google/byra: Add VBTs for variants missing them

mb/google/byra: Add VBTs for variants missing them

Several brya variants were missing VBT files, add and select them in
Kconfig.

Also select in Kconfig for VELL, which already had a VBT but was not
using/selecting it.

TEST=build/boot google/brya (marasov), verify display init functional
/ payload screen shown.

Change-Id: I6848c2b78cf37157299d94bf12c0b6d925ea1432
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83434
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>