ASoC: fsi: fix license specification

According to the file header only GPL v2 applies to it. Fix the
MODULE_LICENSE parameter accordingly.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sh/fsi.c

@@ -2119,7 +2119,7 @@ static struct platform_driver fsi_driver = {
 
 module_platform_driver(fsi_driver);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
 MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
 MODULE_ALIAS("platform:fsi-pcm-audio");