metaknight: Use specific vbt for metaknight

Separate vbt for metaknight from common vbt.

BUG=b:173837995
TEST=emerge-dedede coreboot chromeos-bootimage

Cq-Depend: chrome-internal:3460807
Change-Id: I777e397607d0f6b2a6c105b6e04106df89d2348b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2586592
Reviewed-by: Henry Sun <henrysun@google.com>
Reviewed-by: Raymond Wong <wongraymond@google.com>
Reviewed-by: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Commit-Queue: Karthikeyan Ramasubramanian <kramasub@chromium.org>
Tested-by: Karthikeyan Ramasubramanian <kramasub@chromium.org>
1 file changed