ASoC: max98373 Changed SPDX header in C++ comments style

Signed-off-by: Ryan Lee <ryans.lee@maximintegrated.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max98373.c

-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (c) 2017, Maxim Integrated */
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017, Maxim Integrated
 
 #include <linux/acpi.h>
 #include <linux/i2c.h>

sound/soc/codecs/max98373.h

-/* SPDX-License-Identifier: GPL-2.0 */
-/* Copyright (c) 2017, Maxim Integrated */
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017, Maxim Integrated
+
 #ifndef _MAX98373_H
 #define _MAX98373_H