ARM: shmobile: silk: enable internal PCI

Enable internal AHB-PCI bridges for the USB EHCI/OHCI controllers attached to
them.
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7794-silk.dts

@@ -80,6 +80,16 @@
 		renesas,groups = "vin0_data8", "vin0_clk";
 		renesas,function = "vin0";
 	};
+
+	usb0_pins: usb0 {
+		renesas,groups = "usb0";
+		renesas,function = "usb0";
+	};
+
+	usb1_pins: usb1 {
+		renesas,groups = "usb1";
+		renesas,function = "usb1";
+	};
 };
 
 &scif2 {
@@ -188,3 +198,15 @@
 		};
 	};
 };
+
+&pci0 {
+	status = "okay";
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-names = "default";
+};
+
+&pci1 {
+	status = "okay";
+	pinctrl-0 = <&usb1_pins>;
+	pinctrl-names = "default";
+};