drm/amdgpu/pm: set_pp_feature is unsupport for yellow carp

For yellow carp, SMU firmware just only supports get_pp_feature.

Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>