ASoC: Add FSI-AK4642 sound support for SuperH

This patch is tested by ms7724se

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig
index 01943a1..9154b43 100644
--- a/sound/soc/sh/Kconfig
+++ b/sound/soc/sh/Kconfig
@@ -40,4 +40,12 @@
 	  This option enables generic sound support for the first
 	  AC97 unit of the SH7760.
 
+config SND_FSI_AK4642
+	bool "FSI-AK4642 sound support"
+	depends on SND_SOC_SH4_FSI
+	select SND_SOC_AK4642
+	help
+	  This option enables generic sound support for the
+	  FSI - AK4642 unit
+
 endmenu