ASoC: fsl_spdif: Switch to SPDX identifier

Adopt the SPDX license identifier headers to ease license compliance
management.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_spdif.c

-/*
- * Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
- *
- * Copyright (C) 2013 Freescale Semiconductor, Inc.
- *
- * Based on stmp3xxx_spdif_dai.c
- * Vladimir Barinov <vbarinov@embeddedalley.com>
- * Copyright 2008 SigmaTel, Inc
- * Copyright 2008 Embedded Alley Solutions, Inc
- *
- * 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.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
+//
+// Copyright (C) 2013 Freescale Semiconductor, Inc.
+//
+// Based on stmp3xxx_spdif_dai.c
+// Vladimir Barinov <vbarinov@embeddedalley.com>
+// Copyright 2008 SigmaTel, Inc
+// Copyright 2008 Embedded Alley Solutions, Inc
 
 #include <linux/bitrev.h>
 #include <linux/clk.h>

sound/soc/fsl/fsl_spdif.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * fsl_spdif.h - ALSA S/PDIF interface for the Freescale i.MX SoC
  *
@@ -8,10 +9,6 @@
  * Based on fsl_ssi.h
  * Author: Timur Tabi <timur@freescale.com>
  * Copyright 2007-2008 Freescale Semiconductor, Inc.
- *
- * 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.
  */
 
 #ifndef _FSL_SPDIF_DAI_H