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>
diff --git a/sys-boot/coreboot/files/configs/config.metaknight b/sys-boot/coreboot/files/configs/config.metaknight
index 635feab..2d9c007 100644
--- a/sys-boot/coreboot/files/configs/config.metaknight
+++ b/sys-boot/coreboot/files/configs/config.metaknight
@@ -28,7 +28,7 @@
 # Enable VBT
 CONFIG_INTEL_GMA_ADD_VBT=y
 CONFIG_RUN_FSP_GOP=y
-CONFIG_INTEL_GMA_VBT_FILE="3rdparty/blobs/baseboard-dedede/vbt.bin"
+CONFIG_INTEL_GMA_VBT_FILE="3rdparty/blobs/baseboard-dedede/vbt_metaknight.bin"
 
 # Microcode
 CONFIG_CPU_MICROCODE_CBFS_EXTERNAL_BINS=y