Fix catalyst brain damage to speed up Falcon BMS 2x

[Stanisław Halik]

On 2013-02-16 15:27, Henri Verbeet wrote:
> The driver essentially runs out of GPRs to run the shader. It's
> probably a combination of lack of optimization and a shader that isn't
> so great to begin with. Though if this is with the LLVM shader backend
> for r600g you'll probably just want to disable that, in general you
> get better results without.

[Speaking out of my nether region:]

Does it use registers at all due to lack of indirect addressing?