ARM: dts: rmobile: Enable USB on E2 Alt

The E2 Alt board has two USB ports, add missing DT nodes to make the
USB available.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/dts/r8a7794-alt-u-boot.dts

@@ -13,6 +13,30 @@
 	clock-frequency = <100000>;
 };
 
+&pci0 {
+	status = "okay";
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-names = "default";
+};
+
+&pci1 {
+	status = "okay";
+	pinctrl-0 = <&usb1_pins>;
+	pinctrl-names = "default";
+};
+
+&pfc {
+	usb0_pins: usb0 {
+		groups = "usb0";
+		function = "usb0";
+	};
+
+	usb1_pins: usb1 {
+		groups = "usb1";
+		function = "usb1";
+	};
+};
+
 &scif2 {
 	u-boot,dm-pre-reloc;
 };
@@ -23,3 +47,7 @@
 		spi-rx-bus-width = <1>;
 	};
 };
+
+&usbphy {
+	status = "okay";
+};