It has been confirmed that the SMU metrics table should always reflect
the current fan speed even in manual mode.

Fixes: f6eb4339 ("drm/amdgpu/swsmu: handle manual fan readback on SMU11")
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>