mb/google/auron: add VBTs for variants

Add VBTs for all auron variants, extracted from VGA BIOS
from stock firmware images using intelvbttool, zero-padded
to 0x11ff bytes to make the Intel BMP editor happy.

Test: boot several auron variants with libgfxinit and Tianocore
payload, ensure both internal and external displays as well as
HDMI audio function properly under Linux (4.x/5.x).

Change-Id: Ibc4eabfa5d02b4c08755cf52835b5df8c1291fea
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37714
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/google/auron/Kconfig

@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_AURON
 	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