drm/amd/powerplay: implement pp_power_profile_mode sys inerface for SMU11

Add set/get power profile mode functions.
	Added dependency interfaces:
		1) vega20_set_activity_monitor_coeff
		2) vega20_get_activity_monitor_coeff
		3) conv_power_profile_to_pplib_workload

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>