Correct license in UAPI header file

Add missing `WITH Linux-syscall-note` to the ethosu.h UAPI header file

Change-Id: Ie7abf81108d85faab963a262a27f93c02064e4dd
Signed-off-by: Jonny Svärd <jonny.svaerd@arm.com>
diff --git a/kernel/uapi/ethosu.h b/kernel/uapi/ethosu.h
index 49e8da7..d95bf05 100644
--- a/kernel/uapi/ethosu.h
+++ b/kernel/uapi/ethosu.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022 Arm Limited.
+ * Copyright (c) 2020-2023 Arm Limited.
  *
  * This program is free software and is provided to you under the terms of the
  * GNU General Public License version 2 as published by the Free Software
@@ -15,7 +15,7 @@
  * along with this program; if not, you can access it online at
  * http://www.gnu.org/licenses/gpl-2.0.html.
  *
- * SPDX-License-Identifier: GPL-2.0-only
+ * SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note
  */
 
 #ifndef ETHOSU_H