mb/google/beltino: Add VBTs for all variants

Add VBTs for beltino variants, extracted from VGA BIOS
from stock firmware images using intelvbttool, zero-padded
to 0x11ff bytes to make the Intel BMP editor happy. Use
a common VBT for all except monroe, since it differs as
it has a built-in display (being a Chromebase vs Chromebox).

Change-Id: I82afb20a5648695c2cd568384a26839ab28be3da
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37733
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/beltino/Kconfig

@@ -9,6 +9,7 @@ config BOARD_GOOGLE_BASEBOARD_BELTINO
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME
+	select INTEL_GMA_HAVE_VBT
 	select MAINBOARD_HAS_CHROMEOS
 	select MAINBOARD_HAS_LIBGFXINIT
 	select MAINBOARD_HAS_LPC_TPM
@@ -51,6 +52,11 @@ config VGA_BIOS_FILE
 	string
 	default "pci8086,0406.rom"
 
+# Override the default variant behavior, since the data.vbt is the same
+# for all variants except monroe
+config INTEL_GMA_VBT_FILE
+	default "src/mainboard/$(MAINBOARDDIR)/data.vbt" if !BOARD_GOOGLE_MONROE
+
 config MAINBOARD_SMBIOS_MANUFACTURER
 	string
 	default "GOOGLE"