ASoC: sgtl5000: 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/codecs/sgtl5000.c

-/*
- * sgtl5000.c  --  SGTL5000 ALSA SoC Audio driver
- *
- * Copyright 2010-2011 Freescale Semiconductor, Inc. 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 as
- * published by the Free Software Foundation.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// sgtl5000.c  --  SGTL5000 ALSA SoC Audio driver
+//
+// Copyright 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
 
 #include <linux/module.h>
 #include <linux/moduleparam.h>

sound/soc/codecs/sgtl5000.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * sgtl5000.h - SGTL5000 audio codec interface
  *
  * Copyright 2010-2011 Freescale Semiconductor, Inc.
- *
- * 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.
  */
 
 #ifndef _SGTL5000_H