ASoC: samsung: SMDK_WM8580_PCM needs REGMAP_I2C

This adds a missing dependency for SND_SOC_SMDK_WM8580_PCM to
require REGMAP_I2C to be enabled, avoiding possible build
erorrs.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Xia Kaixu <kaixu.xia@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/samsung/Kconfig

@@ -64,6 +64,7 @@ config SND_SOC_SAMSUNG_JIVE_WM8750
 config SND_SOC_SAMSUNG_SMDK_WM8580
 	tristate "SoC I2S Audio support for WM8580 on SMDK"
 	depends on SND_SOC_SAMSUNG && (MACH_SMDK6410 || MACH_SMDKC100 || MACH_SMDK6440 || MACH_SMDK6450 || MACH_SMDKV210 || MACH_SMDKC110)
+	depends on REGMAP_I2C
 	select SND_SOC_WM8580
 	select SND_SAMSUNG_I2S
 	help
@@ -178,6 +179,7 @@ config SND_SOC_SAMSUNG_SMDK_SPDIF
 config SND_SOC_SMDK_WM8580_PCM
 	tristate "SoC PCM Audio support for WM8580 on SMDK"
 	depends on SND_SOC_SAMSUNG && (MACH_SMDK6450 || MACH_SMDKV210 || MACH_SMDKC110)
+	depends on REGMAP_I2C
 	select SND_SOC_WM8580
 	select SND_SAMSUNG_PCM
 	help