EDAC/synopsys: Add a SPDX identifier

Replace the copyright boilerplate with a SPDX identifier.

  [ bp: Rewrite commit message. ]
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220428044051.2842687-1-shubhrajyoti.datta@xilinx.com

drivers/edac/synopsys_edac.c

+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Synopsys DDR ECC Driver
  * This driver is based on ppc4xx_edac.c drivers
  *
  * Copyright (C) 2012 - 2014 Xilinx, Inc.
- *
- * 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.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details
  */
 
 #include <linux/edac.h>