drm/amdgpu/powerplay: add smu ip block for renoir (v2)

add swSMU [smu_v12_0] for renoir

v2: whitespace fixes (Alex)

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>