arm64: dts: zii-ultra: Fix regulator-3p3-main's name

It's 3V3_MAIN, not 3V3V_MAIN on schematic. Fix it.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mq-zii-ultra.dtsi

@@ -62,7 +62,7 @@ reg_5p0_main: regulator-5p0-main {
 	reg_3p3_main: regulator-3p3-main {
 		compatible = "regulator-fixed";
 		vin-supply = <&reg_12p0_main>;
-		regulator-name = "3V3V_MAIN";
+		regulator-name = "3V3_MAIN";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
 		regulator-always-on;