ASoC: Allow to select ES8328_I2C and ES8328_SPI directly

Currently, we have to select these symbols explictly via Kconfig, from
another entry. If we plan to use generic audio drivers like
simple-audio-card, the user need to be able to enable these symbols
directly via the menuconfig.

This commit also fixes unmet dependencies to SND_SOC_IMX_ES8328 caused
by these changes.
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -528,12 +528,12 @@ config SND_SOC_ES8328
 	tristate "Everest Semi ES8328 CODEC"
 
 config SND_SOC_ES8328_I2C
-	tristate
-	select SND_SOC_ES8328
+	depends on SND_SOC_ES8328
+	tristate "I2C support for Everest Semi ES8328 CODEC"
 
 config SND_SOC_ES8328_SPI
-	tristate
-	select SND_SOC_ES8328
+	depends on SND_SOC_ES8328
+	tristate "SPI support for Everest Semi ES8328 CODEC"
 
 config SND_SOC_GTM601
 	tristate 'GTM601 UMTS modem audio codec'

sound/soc/fsl/Kconfig

@@ -244,7 +244,7 @@ config SND_SOC_IMX_WM8962
 
 config SND_SOC_IMX_ES8328
 	tristate "SoC Audio support for i.MX boards with the ES8328 codec"
-	depends on OF && (I2C || SPI)
+	depends on OF && (I2C || SPI) && SND_SOC_ES8328
 	select SND_SOC_ES8328_I2C if I2C
 	select SND_SOC_ES8328_SPI if SPI_MASTER
 	select SND_SOC_IMX_PCM_DMA