[coreboot] Support for Gigabyte GA-P55-USB3

[Дмитрий]

Hello,
can you please tell me if it is possible to adapt coreboot to run on
this motherboard? It's description can be found on
http://www.gigabyte.com/products/product-page.aspx?pid=3440 . I'm not
quite sure about the ICs on the MB, but according to superiotool it
has IT8720F inside. BIOS resides on two MX25L1605 ICs (one
re-programmable, other is persistent -- for backup). I am also
attaching outputs of utils mentioned in FAQ.

Flashing original BIOS via flashrom seems to work perfectly (upgraded
to version F10g using this method without any problems).