drm/amd/pp: Not call cgs interface to get display info

DC/Non DC all will update display configuration
when the display state changed
No need to get display info through cgs interface

Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/inc/hwmgr.h

@@ -765,7 +765,7 @@ struct pp_hwmgr {
 	struct pp_power_state    *request_ps;
 	struct pp_power_state    *boot_ps;
 	struct pp_power_state    *uvd_ps;
-	struct amd_pp_display_configuration display_config;
+	const struct amd_pp_display_configuration *display_config;
 	uint32_t feature_mask;
 	bool avfs_supported;
 	/* UMD Pstate */