arm64: dts: renesas: ulcb-kf: enable USB2 PHY of channel 0

This supports USB2 PHY channel #0 on ULCB Kingfisher board

The dedicated USB0_PWEN pin is used to control CN13 VBUS source from U43
power supply.
MAX3355 can also provide VBUS, hence it should be disabled via OTG_OFFVBUSn
node coming from gpio expander TCA9539.
Set MAX3355 enabled using OTG_EXTLPn node to be able to read OTG ID of
CN13.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/ulcb-kf.dtsi

@@ -67,6 +67,20 @@ hub_rst {
 			output-high;
 			line-name = "HUB rst";
 		};
+
+		otg_offvbusn {
+			gpio-hog;
+			gpios = <8 GPIO_ACTIVE_HIGH>;
+			output-low;
+			line-name = "OTG OFFVBUSn";
+		};
+
+		otg_extlpn {
+			gpio-hog;
+			gpios = <9 GPIO_ACTIVE_HIGH>;
+			output-high;
+			line-name = "OTG EXTLPn";
+		};
 	};
 
 	gpio_exp_75: gpio@75 {
@@ -154,6 +168,11 @@ scif1_pins: scif1 {
 		groups = "scif1_data_b", "scif1_ctrl";
 		function = "scif1";
 	};
+
+	usb0_pins: usb0 {
+		groups = "usb0";
+		function = "usb0";
+	};
 };
 
 &scif1 {
@@ -164,6 +183,13 @@ &scif1 {
 	status = "okay";
 };
 
+&usb2_phy0 {
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
 &xhci0 {
 	status = "okay";
 };