arm: dts: zynq: Use SPDX-License-Identifier

Follow trend and use the SPDX License description.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-7000.dtsi

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2011 - 2014 Xilinx
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 
 / {

arch/arm/boot/dts/zynq-microzed.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2011 - 2014 Xilinx
  * Copyright (C) 2016 Jagan Teki <jteki@openedev.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 /include/ "zynq-7000.dtsi"

arch/arm/boot/dts/zynq-parallella.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2014 SUSE LINUX Products GmbH
  *
@@ -6,15 +7,6 @@
  *  Copyright (C) 2011 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
  *  Copyright (C) 2013 Xilinx
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 /include/ "zynq-7000.dtsi"

arch/arm/boot/dts/zynq-zc702.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2011 - 2014 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/boot/dts/zynq-zc706.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2011 - 2014 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/boot/dts/zynq-zed.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2011 - 2014 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/boot/dts/zynq-zybo.dts

+// SPDX-License-Identifier: GPL-2.0
 /*
  *  Copyright (C) 2011 - 2014 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"