ARM: dts: s5pv210: align USB node name with bindings

Bindings expect USB HSOTG controller node to be named "usb":

  s5pv210-torbreck.dtb: hsotg@ec000000: $nodename:0: 'hsotg@ec000000' does not match '^usb(@.*)?'

Link: https://lore.kernel.org/r/20230421095721.31857-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm/boot/dts/s5pv210.dtsi

@@ -401,7 +401,7 @@ sdhci3: mmc@eb300000 {
 			status = "disabled";
 		};
 
-		hsotg: hsotg@ec000000 {
+		hsotg: usb@ec000000 {
 			compatible = "samsung,s3c6400-hsotg";
 			reg = <0xec000000 0x20000>;
 			interrupt-parent = <&vic1>;