DRM update

[Hasso Tepper]

http://leaf.dragonflybsd.org/~hasso/dragonfly-patches/drm-update-20081029.patch
updates the DRM code to the very latest one from DRM git repo. Amongst 
other things it brings in support for many newer Intel and AMD/ATI 
chipsets.

Please test and report back any failure or success with brief info (dmesg 
snippet will do in case of success) about chipset in use etc, please.

Note that there is at least one regression compared to the one in the 
kernel - Intel DRM plays worse with XAA (mkay, it doesn't play at all in 
some cases). Although still in use by some users due to performance 
reasons, XAA is considered to be deprecated and bugs are closed in the 
freedesktop.org bugzilla with WONTFIX. So I don't consider it as 
showstopper.


-- 
Hasso Tepper