r600g: fix abysmal performance in Reaction Quake

r600g: fix abysmal performance in Reaction Quake

The problem was we set VRAM|GTT for relocations of STATIC resources.
Setting just VRAM increases the framerate 4 times on my machine.

I rewrote the switch statement and adjusted the domains for window
framebuffers too.

NOTE: This is a candidate for the stable branches.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>