Update license headers

Update all license headers to the correct years.

Change-Id: I18881cbceabe26066d69d8535bb3cb969cbaeba1
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.