ARM: omap2plus_defconfig: Add tlv320aic23 as module

The AM3517 EVM has an expander board which has two tlv320aic23
codecs.  This enables the driver for these codecs as a module.
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -389,6 +389,7 @@ CONFIG_SND_OMAP_SOC_OMAP_TWL4030=m
 CONFIG_SND_OMAP_SOC_OMAP_ABE_TWL6040=m
 CONFIG_SND_OMAP_SOC_OMAP3_PANDORA=m
 CONFIG_SND_SOC_CPCAP=m
+CONFIG_SND_SOC_TLV320AIC23_I2C=m
 CONFIG_SND_SIMPLE_CARD=m
 CONFIG_SND_AUDIO_GRAPH_CARD=m
 CONFIG_HID_GENERIC=m