ASoC: Fix TWL4030 Kconfig dependency

Fixes Kconfig dependency of TWL4030 audio codec driver
with TWL4030 core driver on both overo and omap2evm
boards

Signed-off-by: Arun KS <arunks@mistralsolutions.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/omap/Kconfig

@@ -24,7 +24,7 @@ config SND_OMAP_SOC_OSK5912
 
 config SND_OMAP_SOC_OVERO
 	tristate "SoC Audio support for Gumstix Overo"
-	depends on SND_OMAP_SOC && MACH_OVERO
+	depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OVERO
 	select SND_OMAP_SOC_MCBSP
 	select SND_SOC_TWL4030
 	help
@@ -32,7 +32,7 @@ config SND_OMAP_SOC_OVERO
 
 config SND_OMAP_SOC_OMAP2EVM
 	tristate "SoC Audio support for OMAP2EVM board"
-	depends on SND_OMAP_SOC && MACH_OMAP2EVM
+	depends on TWL4030_CORE && SND_OMAP_SOC && MACH_OMAP2EVM
 	select SND_OMAP_SOC_MCBSP
 	select SND_SOC_TWL4030
 	help