arm: dts: keystone: 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 <Sergey.Semin@baikalelectronics.ru>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>

arch/arm/boot/dts/keystone-k2e.dtsi

@@ -52,7 +52,7 @@ &soc0 {
 
 		usb: usb@2680000 {
 			interrupts = <GIC_SPI 152 IRQ_TYPE_EDGE_RISING>;
-			dwc3@2690000 {
+			usb@2690000 {
 				interrupts = <GIC_SPI 152 IRQ_TYPE_EDGE_RISING>;
 			};
 		};
@@ -78,7 +78,7 @@ keystone_usb1: usb@25000000 {
 			dma-ranges;
 			status = "disabled";
 
-			usb1: dwc3@25010000 {
+			usb1: usb@25010000 {
 				compatible = "snps,dwc3";
 				reg = <0x25010000 0x70000>;
 				interrupts = <GIC_SPI 414 IRQ_TYPE_EDGE_RISING>;

arch/arm/boot/dts/keystone.dtsi

@@ -217,7 +217,7 @@ keystone_usb0: usb@2680000 {
 			dma-ranges;
 			status = "disabled";
 
-			usb0: dwc3@2690000 {
+			usb0: usb@2690000 {
 				compatible = "snps,dwc3";
 				reg = <0x2690000 0x70000>;
 				interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;