ARM: defconfig: fix CONFIG_SND_SOC_AC97_CODEC name

The CONFIG_SND_SOC_AC97 symbol was recently enabled but does not
actually exist. From the patch description, I assume that this
was meant to be CONFIG_SND_SOC_AC97_CODEC, which is used in
imx_v6_v7_defconfig.

Fixes: 2cc1cd26 ("ARM: configs: Enable ASoC AC'97 glue")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/configs/multi_v7_defconfig

@@ -814,7 +814,7 @@ CONFIG_SND_SOC_TEGRA_TRIMSLICE=m
 CONFIG_SND_SOC_TEGRA_ALC5632=m
 CONFIG_SND_SOC_TEGRA_MAX98090=m
 CONFIG_SND_SOC_DAVINCI_MCASP=m
-CONFIG_SND_SOC_AC97=m
+CONFIG_SND_SOC_AC97_CODEC=m
 CONFIG_SND_SOC_AK4642=m
 CONFIG_SND_SOC_CPCAP=m
 CONFIG_SND_SOC_CS42L51_I2C=m