Update to 2021 copyright year ...
// SPDX-License-Identifier: Apache-2.0
// ----------------------------------------------------------------------------
-// Copyright 2011-2020 Arm Limited
+// Copyright 2011-2021 Arm Limited
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy
