drm/amd/powerplay: send event to notify powerplay all modules are initialized.

with this event, powerplay can adjust current power state if needed.
Signed-off-by: NRex Zhu <Rex.Zhu@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_powerplay.c

@@ -143,8 +143,10 @@ static int amdgpu_pp_late_init(void *handle)
 					adev->powerplay.pp_handle);
 
 #ifdef CONFIG_DRM_AMD_POWERPLAY
-	if (adev->pp_enabled)
+	if (adev->pp_enabled) {
 		amdgpu_pm_sysfs_init(adev);
+		amdgpu_dpm_dispatch_task(adev, AMD_PP_EVENT_COMPLETE_INIT, NULL, NULL);
+	}
 #endif
 	return ret;
 }