arm: dts: marvell: armada-375: Harmonize DWC USB3 DT nodes name

In accordance with the DWC USB3 bindings the corresponding node
name is suppose to comply with the Generic USB HCD DT schema, which
requires the USB nodes to have the name acceptable by the regexp:
"^usb(@.*)?" . Make sure the "snps,dwc3"-compatible nodes are correctly
named.

Signed-off-by: Serge Semin <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Gregory CLEMENT <[e-mail]>

arch/arm/boot/dts/armada-375.dtsi

···
 				status = "disabled";
 			};
 
-			usb2: usb3@58000 {
+			usb2: usb@58000 {
 				compatible = "marvell,armada-375-xhci";
 				reg = <0x58000 0x20000>,<0x5b880 0x80>;
 				interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;