ARM: imx_v6_v7_defconfig: Enable AC97 codec support

imx6qdl udoo board has an AC97 codec.

Add support for it by default.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -286,6 +286,7 @@ CONFIG_SND_SOC_IMX_SGTL5000=y
 CONFIG_SND_SOC_IMX_SPDIF=y
 CONFIG_SND_SOC_IMX_MC13783=y
 CONFIG_SND_SOC_FSL_ASOC_CARD=y
+CONFIG_SND_SOC_AC97_CODEC=y
 CONFIG_SND_SOC_CS42XX8_I2C=y
 CONFIG_SND_SOC_TLV320AIC3X=y
 CONFIG_SND_SOC_WM8960=y