ARM: shmobile: r8a7794: add HS-USB DT support

Define the R8A7794 generic part of the HS-USB device node.
It is up to the board file to enable the device.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7794.dtsi

@@ -718,6 +718,18 @@ usb@0,2 {
 		};
 	};
 
+	hsusb: usb@e6590000 {
+		compatible = "renesas,usbhs-r8a7794";
+		reg = <0 0xe6590000 0 0x100>;
+		interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&mstp7_clks R8A7794_CLK_HSUSB>;
+		power-domains = <&cpg_clocks>;
+		renesas,buswait = <4>;
+		phys = <&usb0 1>;
+		phy-names = "usb";
+		status = "disabled";
+	};
+
 	usbphy: usb-phy@e6590100 {
 		compatible = "renesas,usb-phy-r8a7794";
 		reg = <0 0xe6590100 0 0x100>;