[coreboot] vx800 Example Board Patch

[bari]

This is a vx800 mainboard patch based on a different vx800 development 
board. The board is referenced as "example board" due to NDA issues.

It contains some board specific things that we may want to fix. The 
patch is known to work on real hardware and passes the basic tests: 
sound, networking (in XP with a driver), usb, sata, c2c3 in XP, s3,s4, 
powerdown. The point of this patch is to "share early and share often".

Signed-off-by: Bari Ari

-Bari