drm/amd/pm: fix unchecked return value warning for vega10_hwmgr

This resolves the unchecked return value warning reported by Coverity.
Signed-off-by: Tim Huang <tim.huang@amd.com>
Reviewed-by: Jesse Zhang <jesse.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c

@@ -2934,9 +2934,7 @@ static int vega10_stop_dpm(struct pp_hwmgr *hwmgr, uint32_t bitmap)
 		}
 	}
 
-	vega10_enable_smc_features(hwmgr, false, feature_mask);
-
-	return 0;
+	return vega10_enable_smc_features(hwmgr, false, feature_mask);
 }
 
 /**