Enable the i810 driver?

[Eric Anholt]

Sorry for missing this one in the last xorg-server commit.  It wasn't in
the form of a PR, so I didn't remember it when I was preparing that
commit.  I've got the change locally now, but I'll wait until unfreeze
or some other major issue comes up that it can tag along with.  Same for
graphics/dri.

-- 
Eric Anholt                                eta at lclark.edu          
http://people.freebsd.org/~anholt/         anholt at FreeBSD.org