ARM: dts: imx6dl-riotboard: fix OTG regulator polarity

USB OTG power is switched on when the GPIO is pulled low.
Signed-off-by: NAlexander Kurz <akurz@blala.de>
Reviewed-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl-riotboard.dts

@@ -70,8 +70,7 @@
 		regulator-name = "usb_otg_vbus";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
-		gpio = <&gpio3 22 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
+		gpio = <&gpio3 22 GPIO_ACTIVE_LOW>;
 	};
 };