ARM: dts: rmobile: Add EHCI nodes to R8A77965 M3N DT

Add generic EHCI nodes to r8a77965.dtsi to get EHCI USB operational.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/dts/r8a77965.dtsi

@@ -577,11 +577,28 @@
 		};
 
 		ehci0: usb@ee080100 {
-			/* placeholder */
+			compatible = "generic-ehci";
+			reg = <0 0xee080100 0 0x100>;
+			interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 703>;
+			phys = <&usb2_phy0>;
+			phy-names = "usb";
+			companion= <&ohci0>;
+			power-domains = <&sysc 32>;
+			resets = <&cpg 703>;
+			status = "disabled";
 		};
 
 		usb2_phy0: usb-phy@ee080200 {
-			/* placeholder */
+			compatible = "renesas,usb2-phy-r8a77965",
+				     "renesas,rcar-gen3-usb2-phy";
+			reg = <0 0xee080200 0 0x700>;
+			interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 703>;
+			power-domains = <&sysc 32>;
+			resets = <&cpg 703>;
+			#phy-cells = <0>;
+			status = "disabled";
 		};
 
 		ohci1: usb@ee0a0000 {
@@ -589,7 +606,16 @@
 		};
 
 		ehci1: usb@ee0a0100 {
-			/* placeholder */
+			compatible = "generic-ehci";
+			reg = <0 0xee0a0100 0 0x100>;
+			interrupts = <GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 702>;
+			phys = <&usb2_phy1>;
+			phy-names = "usb";
+			companion= <&ohci1>;
+			power-domains = <&sysc 32>;
+			resets = <&cpg 702>;
+			status = "disabled";
 		};
 
 		i2c0: i2c@e6500000 {
@@ -712,7 +738,14 @@
 		};
 
 		usb2_phy1: usb-phy@ee0a0200 {
-			/* placeholder */
+			compatible = "renesas,usb2-phy-r8a77965",
+				     "renesas,rcar-gen3-usb2-phy";
+			reg = <0 0xee0a0200 0 0x700>;
+			clocks = <&cpg CPG_MOD 702>;
+			power-domains = <&sysc 32>;
+			resets = <&cpg 702>;
+			#phy-cells = <0>;
+			status = "disabled";
 		};
 
 		sdhi0: sd@ee100000 {