ARM: shmobile: koelsch: enable USB PHY

Enable USB PHY device for the Koelsch board.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791-koelsch.dts

@@ -474,6 +474,10 @@ &pci1 {
 	pinctrl-names = "default";
 };
 
+&usbphy {
+	status = "okay";
+};
+
 &pcie_bus_clk {
 	status = "okay";
 };