[Openchrome-devel] Modify allocation order to initialize EXA first

[James Simmons]

> Dear James,
> 
> I've been debugging an issue where the X-server crashes after KDE logout. I 
> found that some drm_bo_alloc() calls are executed before EXA was initialized. 
> There are also calls to drm_bo_free() after viaExitAccel().
> 
> I've attached a patch that fixes the issue for me. But I'm not completely sure 
> I did oversee something... Maybe you can have a look?!

The problem of having two backend non-accel buffer allocators. I removed 
the EXA backend since that method will no longer work once I move to EXA 
using CreatePixmap/DestroyPixmap.