Add missing license headers
diff --git a/util/uvmdvgen/testplan.hjson.tpl b/util/uvmdvgen/testplan.hjson.tpl
index 7a68d5d..bc32b68 100644
--- a/util/uvmdvgen/testplan.hjson.tpl
+++ b/util/uvmdvgen/testplan.hjson.tpl
@@ -1,3 +1,6 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
 {
   name: "${name}"
   // TODO: remove the common testplans if not applicable