ASoC: MX31ads sound support should depend on MACH_MX31ADS_WM1133_EV1

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/imx/Kconfig

@@ -13,7 +13,7 @@ config SND_MXC_SOC_SSI
 
 config SND_MXC_SOC_WM1133_EV1
 	tristate "Audio on the the i.MX31ADS with WM1133-EV1 fitted"
-	depends on SND_IMX_SOC && EXPERIMENTAL
+	depends on SND_IMX_SOC && MACH_MX31ADS_WM1133_EV1 && EXPERIMENTAL
 	select SND_SOC_WM8350
 	select SND_MXC_SOC_SSI
 	help