Update license headers

Update all license headers to the correct years.

Change-Id: I18881cbceabe26066d69d8535bb3cb969cbaeba1
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.