MLECO-3583: Update copyright notice according to new guidelines

Change-Id: I0f057b33993e5196a60e52f4fb0c60e09693dcfe
diff --git a/source/hal/source/platform/simple/source/timer_simple_platform.c b/source/hal/source/platform/simple/source/timer_simple_platform.c
index 8086abd..ca44c32 100644
--- a/source/hal/source/platform/simple/source/timer_simple_platform.c
+++ b/source/hal/source/platform/simple/source/timer_simple_platform.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022 Arm Limited. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright 2021-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");