dsa: Add SPDX header to tag drivers.

Add an SPDX header, and remove the license boilerplate text.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/dsa/tag_brcm.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Broadcom tag support
  *
  * Copyright (C) 2014 Broadcom Corporation
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_dsa.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * net/dsa/tag_dsa.c - (Non-ethertype) DSA tagging
  * Copyright (c) 2008-2009 Marvell Semiconductor
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_edsa.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * net/dsa/tag_edsa.c - Ethertype DSA tagging
  * Copyright (c) 2008-2009 Marvell Semiconductor
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_ksz.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * net/dsa/tag_ksz.c - Microchip KSZ Switch tag format handling
  * Copyright (c) 2017 Microchip Technology
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_lan9303.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2017 Pengutronix, Juergen Borleis <jbe@pengutronix.de>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2, as published by the Free Software Foundation.
- *
- * 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.
- *
  */
 #include <linux/dsa/lan9303.h>
 #include <linux/etherdevice.h>

net/dsa/tag_mtk.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Mediatek DSA Tag support
  * Copyright (C) 2017 Landen Chao <landen.chao@mediatek.com>
  *		      Sean Wang <sean.wang@mediatek.com>
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_qca.c

+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 and
- * only version 2 as published by the Free Software Foundation.
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>

net/dsa/tag_trailer.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * net/dsa/tag_trailer.c - Trailer tag format handling
  * Copyright (c) 2008-2009 Marvell Semiconductor
- *
- * 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.
  */
 
 #include <linux/etherdevice.h>