drm/amdgpu/gfx9: disable gfxoff when reading rlc clock

Otherwise we readback all ones.  Fixes rlc counter
readback while gfxoff is active.

Reviewed-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-02-12 08:51:29 -05:00
commit e5f134958d