drm/amd/pm: skip dpm disablement on suspend for SMU 13.0.0

Since PMFW will handle this properly. Driver involvement is
unnecessary.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>