mb/google/sarien: Add VBT extracted from Chrome OS

mb/google/sarien: Add VBT extracted from Chrome OS

The VBT is extracted from Chromium OS in developer mode with the device
running firwmare .

    $ sudo dmesg | grep ' DMI:'
    [    0.000000] DMI: Dell Inc. Sarien/Sarien, BIOS Google_Sarien.12200.99.0 07/29/2020
    $ sudo cbmem -1
    coreboot-v1.9308_26_0.0.22-8761-gdba94f429a Wed Jul 29 16:09:30 UTC 2020 bootblock starting (log level: 8)...
    […]
    coreboot-v1.9308_26_0.0.22-8761-gdba94f429a Wed Jul 29 16:09:30 UTC 2020 ramstage starting (log level: 8)...
    […]
    CBFS: Locating 'vbt.bin'
    CBFS: Found @ offset 614c0 size 4a0
    Found a VBT of 4608 bytes after decompression
    […]
    $ sudo cp /sys/kernel/debug/dri/0/i915_vbt vbt.bin

Using the Chrome OS recovery image, Matt DeVillier verified, that the
Sarien VBT is identical to Arcada, so add the VBT for all variants.

Change-Id: Ibab8a7b0b3f721ca434ac38b51528b81e66f3bb7
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60735
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>