ASoC: cirrus: Remove excess dependencies on SND_SOC

Configuration for Cirrus Logic audio support is included only
if SND_SOC symbol selected, so no reason to check it once more.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/cirrus/Kconfig

 config SND_EP93XX_SOC
 	tristate "SoC Audio support for the Cirrus Logic EP93xx series"
-	depends on (ARCH_EP93XX || COMPILE_TEST) && SND_SOC
+	depends on ARCH_EP93XX || COMPILE_TEST
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 	help
 	  Say Y or M if you want to add support for codecs attached to