drm/amdgpu/smu8: return an error rather than 50% if busy query fails

For consistency with SMU10.

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2021-03-10 12:08:42 -05:00
commit 9a9ec6c32c