Old INTEL drm code

[Ignatios Souvatzis <is%NetBSD.org@localhost>]

I wonder: does the old intel drm code really not work with i810/i815,
or was it a mistake to leave those PCI IDs out of the code?

(Is it expected to work with the work-in-progress code?)

I get:

vga1 at pci0 dev 2 function 0: vendor 0x8086 product 0x1132 (rev. 0x11)
drm at vga1 not configured

with NetbSD-6.0.1_PATCH on a nowadays oldish Sony VAIO, and 2012Q4
modular xorg doesn't work with it (wrong graphics mode with,
apparently, wrong pixel addressing such that xeyes in the top left
corner is at roughly three quarters of the width to the right, and
magnified by a factor of about 4 or five in both directions (with
background pixels interspersed).

        -is