[coreboot] Intel P35/Q35/G33/Q33/G31/P31

[Loïc Grenié]

Here is a patch for inteltool to print the registers values
 for the P31..Q35 chipset. The registers are (as far as I
 can tell) unchanged with respect to those of the PM965.
 I've no strong ideas on the names: I've chosen
 PCI_DEVICE_ID_INTEL_82[PQG]3[135] as Northbridge
 names, they can obviously be changed to anything else. I've
 given "Q35", "P35/G33/G31/P31" and "Q33" as descriptions,
 they can also be freely changed.

Signed-off-by: Loïc Grenié 
Description: adds 82Q35/P35/Q33/G33/G31/P31 capability.

Please consider for applying,

Thanks,

Loïc