drm/amd/powerplay: add mclk_latency_table struct and smu_clocks struct for SMU11

add mclk_latency_table struct and smu_clocks structi
to support sys interface for SMU11.

Signed-off-by: Chengming Gui <Jack.Gui@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>