arm: zynq: Sync up licenses with mainline kernel

Use different location for SPDX line. Also update dates for new mainline
DTS files.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynq-cc108.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx CC108 board DTS
  *
- * (C) Copyright 2007-2013 Xilinx, Inc.
+ * (C) Copyright 2007-2018 Xilinx, Inc.
  * (C) Copyright 2007-2013 Michal Simek
  * (C) Copyright 2007-2012 PetaLogix Qld Pty Ltd
  *
  * Michal SIMEK <monstr@monstr.eu>
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 /include/ "zynq-7000.dtsi"

arch/arm/dts/zynq-zc702.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
- * Xilinx ZC702 board DTS
- *
  *  Copyright (C) 2011 - 2015 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zc706.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
- * Xilinx ZC706 board DTS
- *
  *  Copyright (C) 2011 - 2015 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zc770-xm010.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx ZC770 XM010 board DTS
  *
- * Copyright (C) 2013 - 2015 Xilinx, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
+ * Copyright (C) 2013-2018 Xilinx, Inc.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zc770-xm011.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx ZC770 XM013 board DTS
  *
- * Copyright (C) 2013 Xilinx, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
+ * Copyright (C) 2013-2018 Xilinx, Inc.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zc770-xm012.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx ZC770 XM012 board DTS
  *
- * Copyright (C) 2013 - 2015 Xilinx, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
+ * Copyright (C) 2013-2018 Xilinx, Inc.
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zc770-xm013.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx ZC770 XM013 board DTS
  *
  * Copyright (C) 2013 Xilinx, Inc.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zed.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
- * Xilinx ZED board DTS
- *
  *  Copyright (C) 2011 - 2015 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"

arch/arm/dts/zynq-zybo.dts

+// SPDX-License-Identifier: GPL-2.0+
 /*
- * Digilent ZYBO board DTS
- *
  *  Copyright (C) 2011 - 2015 Xilinx
  *  Copyright (C) 2012 National Instruments Corp.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"