Change license to BSD-2-Clause

This was announced on the Tillitis Blog the 2nd of October 2024, for
more info visit https://tillitis.se

hw/application_fpga/tools/load_preloaded_app.sh

@@ -1,7 +1,8 @@
 #!/bin/bash -e
 
 # SPDX-FileCopyrightText: 2025 Tillitis AB <tillitis.se>
-# SPDX-License-Identifier: GPL-2.0-only
+# SPDX-License-Identifier: BSD-2-Clause
+
 if [ $# != 2 ]
 then
     echo "Usage: $0 slot_num app_file"