ARM: dts: nuvoton: Add OHCI node

The EHCI peripheral already exists in the devicetree, but the hardware
also supports a discrete OHCI unit on the same USB PHY. Generic OHCI
works fine for this device already and has been tested on real hardware.

Signed-off-by: William A. Kennington III <william@wkennington.com>
Link: https://patch.msgid.link/20250401233409.3215091-1-william@wkennington.com
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/arch/arm/boot/dts/nuvoton/nuvoton-common-npcm7xx.dtsi b/arch/arm/boot/dts/nuvoton/nuvoton-common-npcm7xx.dtsi
index 7e72b9e..e337f40 100644
--- a/arch/arm/boot/dts/nuvoton/nuvoton-common-npcm7xx.dtsi
+++ b/arch/arm/boot/dts/nuvoton/nuvoton-common-npcm7xx.dtsi
@@ -156,6 +156,13 @@ ehci1: usb@f0806000 {
 			status = "disabled";
 		};
 
+		ohci1: usb@f0807000 {
+			compatible = "generic-ohci";
+			reg = <0xf0807000 0x1000>;
+			interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+			status = "disabled";
+		};
+
 		fiu0: spi@fb000000 {
 			compatible = "nuvoton,npcm750-fiu";
 			#address-cells = <1>;