arm: dts: imx6qdl-gw552x.dtsi: fix VBUS supply

Remove the invalid 'regulator-always-on' property to resolve:
starting USB...
Bus usb@2184000: Error enabling VBUS supply (ret=-13)
probe failed, error -13
Bus usb@2184200: USB EHCI 1.00

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/arch/arm/dts/imx6qdl-gw552x.dtsi b/arch/arm/dts/imx6qdl-gw552x.dtsi
index 5462907..7935b10 100644
--- a/arch/arm/dts/imx6qdl-gw552x.dtsi
+++ b/arch/arm/dts/imx6qdl-gw552x.dtsi
@@ -120,7 +120,6 @@
 		regulator-name = "5P0V";
 		regulator-min-microvolt = <5000000>;
 		regulator-max-microvolt = <5000000>;
-		regulator-always-on;
 	};
 };