drm/amd/powerplay: introduce smu feature type to handle feature mask for each asic

drm/amd/powerplay: introduce smu feature type to handle feature mask for each asic

This patch introduces new smu feature type, it's to handle the different feature
mask defines for each asic with the same smu ip.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>