arm64: dts: imx8mq-librem5: fix audio-1v8 regulator name

Fix the regulator name for the audio-1v8 regulator.
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -84,7 +84,7 @@ reg_aud_1v8: regulator-audio-1v8 {
 		compatible = "regulator-fixed";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_audiopwr>;
-		regulator-name = "AUDIO_PWR_EN";
+		regulator-name = "AUD_1V8";
 		regulator-min-microvolt = <1800000>;
 		regulator-max-microvolt = <1800000>;
 		gpio = <&gpio1 4 GPIO_ACTIVE_HIGH>;