Final split of -ati wrapper and -radeon?

[Luc Verhaegen]

Now that -mach64 and -r128 are separate drivers, is there any reason to 
still keep the ati wrapper and the radeon driver in the same tree?

Seeing from the commits for mach64 and r128, it seemed like there is 
just a tiny bit of busywork left to make this final split reality.

Thanks,

Luc Verhaegen.