ASoC: add rt298 codec driver

It is the initial version of ALC298 codec driver.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index efaafce..76125a2 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -83,6 +83,7 @@
 	select SND_SOC_PCM512x_I2C if I2C
 	select SND_SOC_PCM512x_SPI if SPI_MASTER
 	select SND_SOC_RT286 if I2C
+	select SND_SOC_RT298 if I2C
 	select SND_SOC_RT5631 if I2C
 	select SND_SOC_RT5640 if I2C
 	select SND_SOC_RT5645 if I2C
@@ -512,12 +513,18 @@
 config SND_SOC_RL6347A
 	tristate
 	default y if SND_SOC_RT286=y
+	default y if SND_SOC_RT298=y
 	default m if SND_SOC_RT286=m
+	default m if SND_SOC_RT298=m
 
 config SND_SOC_RT286
 	tristate
 	depends on I2C
 
+config SND_SOC_RT298
+	tristate
+	depends on I2C
+
 config SND_SOC_RT5631
 	tristate "Realtek ALC5631/RT5631 CODEC"
 	depends on I2C