ARM: mvebu: remove duplicated regulator definition in Armada 388 GP

The Armada 388 GP Device Tree file describes two times a regulator
named 'reg_usb2_1_vbus', with the exact same description. This has
been wrong since Armada 388 GP support was introduced.

Fixes: 928413bd ("ARM: mvebu: Add Armada 388 General Purpose Development Board support")
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: <stable@vger.kernel.org> # v4.0+
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/boot/dts/armada-388-gp.dts

@@ -303,16 +303,6 @@
 		gpio = <&expander0 4 GPIO_ACTIVE_HIGH>;
 	};
 
-	reg_usb2_1_vbus: v5-vbus1 {
-		compatible = "regulator-fixed";
-		regulator-name = "v5.0-vbus1";
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-		enable-active-high;
-		regulator-always-on;
-		gpio = <&expander0 4 GPIO_ACTIVE_HIGH>;
-	};
-
 	reg_sata0: pwr-sata0 {
 		compatible = "regulator-fixed";
 		regulator-name = "pwr_en_sata0";