[SeaBIOS] Geode vga pci code

[Nils]

>> I don't know if this is a bug but when i use the name
>>"pci100b,0030.rom"
>> for the vgabios it is still not loading it.
>> It would be nice to be able to add the vgabios to cbfs via the
>>existing
>> coreboot kconfig option.
>
>Something's not right with the way the PCI device is configured.  You
>could try putting debug statements in is_pci_vga() to find out what.

I fixed this problem.
The PCI_COMMAND_IO bit was not set in the VGA PCI space.

Thanks, Nils.