arm64: defconfig: Enable the WM8524 codec driver

imx8mn-evk has a WM8524 codec.

Enable the WM8524 codec driver so that audio can be functional
on this board.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/configs/defconfig

@@ -812,6 +812,7 @@ CONFIG_SND_SOC_SIMPLE_MUX=m
 CONFIG_SND_SOC_TAS571X=m
 CONFIG_SND_SOC_TLV320AIC32X4_I2C=m
 CONFIG_SND_SOC_WCD934X=m
+CONFIG_SND_SOC_WM8524=m
 CONFIG_SND_SOC_WM8904=m
 CONFIG_SND_SOC_WM8960=m
 CONFIG_SND_SOC_WM8962=m