drm/amd/pm: drop unneeded dpm features disablement for SMU 13.0.0/7

PMFW will handle that properly. Driver involvement may cause some
unexpected issues.

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