arm64: dts: imx8mq-librem5: Don't set mic-cfg for wm8962

The default values are fine, and MICDET_ENA is handled by the driver on
its own anyway.

Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: dos1

arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi

@@ -1085,7 +1085,6 @@
 		assigned-clock-parents = <&clk IMX8MQ_AUDIO_PLL1_OUT>;
 		assigned-clock-rates = <24576000>;
 		#sound-dai-cells = <0>;
-		mic-cfg = <0x200>;
 		DCVDD-supply = <&reg_aud_1v8>;
 		DBVDD-supply = <&reg_aud_1v8>;
 		AVDD-supply = <&reg_aud_1v8>;