ASoC: audio-graph-scu-card.c: convert to SPDX identifiers

/*

 * ASoC audio graph SCU sound card support

 *

 * Copyright (C) 2017 Renesas Solutions Corp.

 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

 *

 * based on

 *	${LINUX}/sound/soc/generic/simple-scu-card.c

 *	${LINUX}/sound/soc/generic/audio-graph-card.c

 *

 * 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

//

// ASoC audio graph SCU sound card support

//

// Copyright (C) 2017 Renesas Solutions Corp.

// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

//

// based on

//	${LINUX}/sound/soc/generic/simple-scu-card.c

//	${LINUX}/sound/soc/generic/audio-graph-card.c

#include <linux/clk.h>

#include <linux/device.h>

#include <linux/gpio.h>