arm64: dts: marvell: Rename armada-37xx USB node

No need to reflect the USB version in the node name.

Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
[gregory.clement@free-electrons.com: drop Fixes tag as it is not a bug fix.]

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -105,7 +105,7 @@
 				status = "disabled";
 			};
 
-			usb3: usb3@58000 {
+			usb3: usb@58000 {
 				compatible = "generic-xhci";
 				reg = <0x58000 0x4000>;
 				interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;