drm/amd/amdgpu: Various tidy ups for gfx6

Various whitespace and logical simplifications for gfx6.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed