arc: dts: Harmonize EHCI/OHCI DT nodes name

In accordance with the Generic EHCI/OHCI 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 "generic-ehci" and "generic-ohci"-compatible
nodes are correctly named.

Signed-off-by: Serge Semin <[e-mail]>
Acked-by: Alexey Brodkin <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Vineet Gupta <[e-mail]>

arch/arc/boot/dts/axc003.dtsi

···
 			dma-coherent;
 		};
 
-		ehci@40000 {
+		usb@40000 {
 			dma-coherent;
 		};
 
-		ohci@60000 {
+		usb@60000 {
 			dma-coherent;
 		};
 

arch/arc/boot/dts/axc003_idu.dtsi

···
 			dma-coherent;
 		};
 
-		ehci@40000 {
+		usb@40000 {
 			dma-coherent;
 		};
 
-		ohci@60000 {
+		usb@60000 {
 			dma-coherent;
 		};
 

arch/arc/boot/dts/axs10x_mb.dtsi

···
 			mac-address = [00 00 00 00 00 00]; /* Filled in by U-Boot */
 		};
 
-		ehci@40000 {
+		usb@40000 {
 			compatible = "generic-ehci";
 			reg = < 0x40000 0x100 >;
 			interrupts = < 8 >;
 		};
 
-		ohci@60000 {
+		usb@60000 {
 			compatible = "generic-ohci";
 			reg = < 0x60000 0x100 >;
 			interrupts = < 8 >;

arch/arc/boot/dts/hsdk.dts

···
 			};
 		};
 
-		ohci@60000 {
+		usb@60000 {
 			compatible = "snps,hsdk-v1.0-ohci", "generic-ohci";
 			reg = <0x60000 0x100>;
 			interrupts = <15>;
···
 			dma-coherent;
 		};
 
-		ehci@40000 {
+		usb@40000 {
 			compatible = "snps,hsdk-v1.0-ehci", "generic-ehci";
 			reg = <0x40000 0x100>;
 			interrupts = <15>;

arch/arc/boot/dts/vdk_axs10x_mb.dtsi

···
 			clock-names = "stmmaceth";
 		};
 
-		ehci@40000 {
+		usb@40000 {
 			compatible = "generic-ehci";
 			reg = < 0x40000 0x100 >;
 			interrupts = < 8 >;