xf86-video-ati: Changes to 'screen-conv-api'

[Dave Airlie]

New branch 'screen-conv-api' available with the following commits:
commit 8b78fb4e0c98987d965319624772aa1e369b4a7b
Author: Dave Airlie <airlied at redhat.com>
Date:   Wed May 16 15:45:53 2012 +0100

    ati: convert to new screen conversion APIs
    
    The compat header takes care of the old server vs new server.
    
    this commit was autogenerated from util/modular/x-driver-screen-scrn-conv.sh
    
    Signed-off-by: Dave Airlie <airlied at redhat.com>

commit e6cd3ba477dbbb95b5d5c618a05af8175838c73a
Author: Dave Airlie <airlied at redhat.com>
Date:   Wed May 16 15:42:59 2012 +0100

    radeon: add compat-api.h