ARM: dts: rmobile: Add xHCI node to R8A77965 M3N DT

Add xHCI node to r8a77965.dtsi to get xHCI USB operational.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/arch/arm/dts/r8a77965.dtsi b/arch/arm/dts/r8a77965.dtsi
index 4a2cbdf..bb29843 100644
--- a/arch/arm/dts/r8a77965.dtsi
+++ b/arch/arm/dts/r8a77965.dtsi
@@ -773,7 +773,14 @@
 		};
 
 		xhci0: usb@ee000000 {
-			/* placeholder */
+			compatible = "renesas,xhci-r8a77965",
+				     "renesas,rcar-gen3-xhci";
+			reg = <0 0xee000000 0 0xc00>;
+			interrupts = <GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 328>;
+			power-domains = <&sysc 32>;
+			resets = <&cpg 328>;
+			status = "disabled";
 		};
 
 		wdt0: watchdog@e6020000 {