xf86-video-ati: Changes to 'kms-only'

[Dave Airlie]

New branch 'kms-only' available with the following commits:
commit 18d5ae3bd9075ac1a2ee21b071ac133e2e634b62
Author: Dave Airlie <airlied at redhat.com>
Date:   Fri Jun 15 10:05:03 2012 +0100

    radeon: drop all UMS/DRI1/XAA/overlay support.
    
    This overhauls the radeon driver and removes all the old UMS-only code,
    it drops all the UMS, DRI1, XAA, overlay Xv, video capture, tv tuners
    
    There are probably a lot more cleanups that will fall out of this afterwards.
    
    So far this is compile/build tested.
    
    Signed-off-by: Dave Airlie <airlied at redhat.com>