[coreboot] Add VGA BIOS failed.

[Myles Watson]

> Hallo, thanks for your answer. I had the coreboot-read.bin from the
> coreboot source "coreboot-v2-4475", it is just renamed (coreboot.rom). I
> used the target for IEI_JUKI_511P board because it is near the same as I
> have.

Does this board have CBFS support?  If it didn't, try this again with
Patrick's patches.  The error looks like cbfstool didn't find CBFS in your
ROM image.

Thanks,
Myles