mb/google/rambi: add VBTs for variants

Add VBTs for all rambi variants, extracted from VGA BIOS
from stock firmware images using intelvbttool.

Test: boot several rambi variants using MrChromebox edk2/master
branch with Baytrail GOP driver and extracted VBTs.

Change-Id: I401ae5accd852fc5211092a5944fc85871b642ae
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37761
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/mainboard/google/rambi/Kconfig

@@ -9,6 +9,7 @@ config BOARD_GOOGLE_BASEBOARD_RAMBI
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME
+	select INTEL_GMA_HAVE_VBT if !BOARD_GOOGLE_RAMBI
 	select MAINBOARD_HAS_CHROMEOS
 	select MAINBOARD_HAS_LPC_TPM
 	select MAINBOARD_HAS_TPM1