XX_kt400-agp

From: Nicolas Mailhot <Nicolas.Mailhot@laPoste.net>
on http://www.uwsg.iu.edu/hypermail/linux/kernel/0211.3/0466.html

This is a tiny patch to support agp on Via KT400 hardware. It basically
adds the KT400 pci ID and lists it as using Via generic setup routines.

-------------------------------------------------------------------------------
