drm/amd/powerplay: fix mclk can't switch on Tonga

regression issue caused by
commit 47047263c52779f1f3393c32e3e53661b53a372e
("drm/amd/powerplay: delete eventmgr related files.")

Reviewed-by: Evan Quan <[e-mail]>
Signed-off-by: Rex Zhu <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/powerplay/hwmgr/hwmgr.c

···
 
 	phm_stop_thermal_controller(hwmgr);
 	psm_set_boot_states(hwmgr);
-	phm_display_configuration_changed(hwmgr);
 	psm_adjust_power_state_dynamic(hwmgr, false, NULL);
 	phm_disable_dynamic_state_management(hwmgr);
 	phm_disable_clock_power_gatings(hwmgr);

drivers/gpu/drm/amd/powerplay/hwmgr/pp_psm.c

···
 	if (skip)
 		return 0;
 
+	phm_display_configuration_changed(hwmgr);
+
 	if (new_ps != NULL)
 		requested = new_ps;
 	else
···
 	pcurrent = hwmgr->current_ps;
 
 	phm_apply_state_adjust_rules(hwmgr, requested, pcurrent);
-
 	if (pcurrent == NULL || (0 != phm_check_states_equal(hwmgr,
 			&pcurrent->hardware, &requested->hardware, &equal)))
 		equal = false;
···
 		phm_set_power_state(hwmgr, &pcurrent->hardware, &requested->hardware);
 		memcpy(hwmgr->current_ps, hwmgr->request_ps, hwmgr->ps_size);
 	}
+
+	phm_notify_smc_display_config_after_ps_adjustment(hwmgr);
+
 	return 0;
 }