inteltool: Add PCI IDs for the C220 PCH series

Adds missing PCI IDs to allow tool to dump the
C220 PCH (8 series) southbridge.

Intel Document 328904 is the datasheet for this PCH.

Change-Id: I07a8f2e9cb0ee8677c8fe2c51881147ed81c1a35
Signed-off-by: Quan Tran <qeed.quan@gmail.com>
Reviewed-on: https://review.coreboot.org/27168
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
6 files changed