MLBEDSW-6620: Update copyright notice and years

- Update copyright notices to use SPDX format and add OSS mail as contact.
- Update years on files where it had been missed.

Signed-off-by: Rickard Bolin <rickard.bolin@arm.com>
Change-Id: I7e9715ea4e17b76252728c708e46df12ad67ab1f
diff --git a/ethosu/mlw_codec/test/test_mlw_codec.py b/ethosu/mlw_codec/test/test_mlw_codec.py
index d77c82a..9e7789d 100644
--- a/ethosu/mlw_codec/test/test_mlw_codec.py
+++ b/ethosu/mlw_codec/test/test_mlw_codec.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# Copyright (C) 2020 Arm Limited or its affiliates. All rights reserved.
+# SPDX-FileCopyrightText: Copyright 2020-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
 #
 # SPDX-License-Identifier: Apache-2.0
 #
@@ -14,6 +14,7 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+#
 # Simple example of the usage of mlw_codec.
 from typing import Any
 from typing import List