drm/amdgpu fix amdgpu.dpm=0 (v2)

Fix crash when disabling dpm.

v2: agd5f: fix coding style, cleanup commit message

Signed-off-by: Sonny Jiang <sonny.jiang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
1 file changed