Update license headers

Update all license headers to the correct years.

Change-Id: I18881cbceabe26066d69d8535bb3cb969cbaeba1
diff --git a/applications/hello_world/main.cpp b/applications/hello_world/main.cpp
index 6dd745a..6272241 100644
--- a/applications/hello_world/main.cpp
+++ b/applications/hello_world/main.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/applications/trustzone_inference/common/secure_entries.hpp b/applications/trustzone_inference/common/secure_entries.hpp
index 981d421..3001196 100644
--- a/applications/trustzone_inference/common/secure_entries.hpp
+++ b/applications/trustzone_inference/common/secure_entries.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/applications/trustzone_inference/secure/mpc_sie_drv.c b/applications/trustzone_inference/secure/mpc_sie_drv.c
index 23dbf50..e93d37d 100644
--- a/applications/trustzone_inference/secure/mpc_sie_drv.c
+++ b/applications/trustzone_inference/secure/mpc_sie_drv.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited. All rights reserved.
+ * Copyright (c) 2016-2021 Arm Limited. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/applications/trustzone_inference/secure/mpc_sie_drv.h b/applications/trustzone_inference/secure/mpc_sie_drv.h
index 927d0a8..e2f3611 100644
--- a/applications/trustzone_inference/secure/mpc_sie_drv.h
+++ b/applications/trustzone_inference/secure/mpc_sie_drv.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2019 Arm Limited. All rights reserved.
+ * Copyright (c) 2016-2019, 2021 Arm Limited. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/cmake/helpers.cmake b/cmake/helpers.cmake
index 686488b..389deb9 100644
--- a/cmake/helpers.cmake
+++ b/cmake/helpers.cmake
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020 Arm Limited. All rights reserved.
+# Copyright (c) 2020-2021 Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
diff --git a/targets/common/include/target.hpp b/targets/common/include/target.hpp
index abe3fdc..390dd2f 100644
--- a/targets/common/include/target.hpp
+++ b/targets/common/include/target.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/targets/common/src/init.cpp b/targets/common/src/init.cpp
index 6eecc42..54e4590 100644
--- a/targets/common/src/init.cpp
+++ b/targets/common/src/init.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/targets/corstone-300/CMakeLists.txt b/targets/corstone-300/CMakeLists.txt
index 7653926..538a978 100644
--- a/targets/corstone-300/CMakeLists.txt
+++ b/targets/corstone-300/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020 Arm Limited. All rights reserved.
+# Copyright (c) 2020-2021 Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: Apache-2.0
 #
diff --git a/targets/corstone-300/retarget.c b/targets/corstone-300/retarget.c
index b83ac40..13cf68b 100644
--- a/targets/corstone-300/retarget.c
+++ b/targets/corstone-300/retarget.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2020 Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *
diff --git a/targets/corstone-300/target.cpp b/targets/corstone-300/target.cpp
index d5c44ea..e5f4680 100644
--- a/targets/corstone-300/target.cpp
+++ b/targets/corstone-300/target.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020 Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: Apache-2.0
  *