drm/amdgpu/gfx8: move MEC doorbell range setting

It's global, not queue specific, so move it out of the
kiq register init function.

Tested-and-Reviewed-by:  Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed