drm/amdgpu: fix a amdgpu_dpm=0 bug
drm/amdgpu: fix a amdgpu_dpm=0 bug

Signed-off-by: Sonny Jiang <ce8b2206d1c203aef6ffc5d8886b3d2e0f59a252@amd.com>
Reviewed-by: Alex Deucher <08dc22c6156113f2deff178e35e3ed9b24d6af9e@amd.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs