apm821xx: use SPDX-License-identifiers

Please note that the DTS are based on really old .DTS from vendors
themselves.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/apm821xx/dts/apm82181.dtsi

@@ -1,24 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Device Tree for Bluestone (APM821xx) board.
  *
  * Copyright (c) 2010, Applied Micro Circuits Corporation
  * Author: Tirumala R Marri <tmarri@apm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
  */
 
 #include <dt-bindings/dma/dw-dmac.h>

target/linux/apm821xx/dts/meraki-mr24.dts

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Device Tree Source for Meraki MR24 (Ikarem)
  *
  * Copyright (C) 2016 Chris Blake <chrisrblake93@gmail.com>
  *
  * Based on Cisco Meraki GPL Release r23-20150601 MR24 DTS
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
  */
 
 /dts-v1/;

target/linux/apm821xx/dts/meraki-mx60.dts

@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Device Tree Source for Meraki MX60/MX60W (Buckminster)
  *
  * Copyright (C) 2016 Chris Blake <chrisrblake93@gmail.com>
  *
  * Based on Cisco Meraki DTS extracted from release wired-12-217818
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
  */
 
 /dts-v1/;

target/linux/apm821xx/dts/netgear-wndap620.dts

@@ -1,10 +1,4 @@
-/*
+// SPDX-License-Identifier: GPL-2.0-only
- * Device Tree Source for Netgear WNDAP620
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
- */
 
 /dts-v1/;
 

target/linux/apm821xx/dts/netgear-wndap660.dts

@@ -1,10 +1,4 @@
-/*
+// SPDX-License-Identifier: GPL-2.0-only
- * Device Tree Source for Netgear WNDAP660
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
- */
 
 /dts-v1/;
 

target/linux/apm821xx/dts/netgear-wndap6x0.dtsi

@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Device Tree Source for Netgear WNDAP620 and WNDAP660
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
  */
 
 #include "apm82181.dtsi"

target/linux/apm821xx/dts/netgear-wndr4700.dts

@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Device Tree Source for Netgear WNDR4700/WNDR4720 Series
  *
  * Copyright 2008 DENX Software Engineering, Stefan Roese <sr@denx.de>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
  */
 
 /dts-v1/;

target/linux/apm821xx/dts/wd-mybooklive.dts

@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2008 DENX Software Engineering, Stefan Roese <sr@denx.de>
  * (c) Copyright 2010 Western Digital Technologies, Inc. All Rights Reserved.
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without
- * any warranty of any kind, whether express or implied.
  */
 
 /dts-v1/;