Update license headers

Update all license headers to the correct years.

Change-Id: I18881cbceabe26066d69d8535bb3cb969cbaeba1
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
  *