ASoC: samsung: i2s: Convert to SPDX License Indentifier

Replace GPL v2.0 license statements with SPDX license identifier.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/samsung/i2s.c

-/*
- * ALSA SoC Audio Layer - Samsung I2S Controller driver
- *
- * Copyright (c) 2010 Samsung Electronics Co. Ltd.
- *	Jaswinder Singh <jassisinghbrar@gmail.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 as
- * published by the Free Software Foundation.
- */
+// SPDX-License-Identifier: GPL-2.0
+//
+// ALSA SoC Audio Layer - Samsung I2S Controller driver
+//
+// Copyright (c) 2010 Samsung Electronics Co. Ltd.
+//	Jaswinder Singh <jassisinghbrar@gmail.com>
 
 #include <dt-bindings/sound/samsung-i2s.h>
 #include <linux/delay.h>