ARM: dts: add rk3288 ehci usb devices

rk3288 has two kind of usb controller; this adds the ehci variant for
host0 and hsic.

At the moment we don't add any phys for these controllers, but the
default settings seem to work OK.

There is a hardware problem in ohci controller which make it
unavailable and host0 controller can only support high-speed devices.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288.dtsi

@@ -251,6 +251,26 @@
 		status = "disabled";
 	};
 
+	usb_host0_ehci: usb@ff500000 {
+		compatible = "generic-ehci";
+		reg = <0xff500000 0x100>;
+		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru HCLK_USBHOST0>;
+		clock-names = "usbhost";
+		status = "disabled";
+	};
+
+	/* NOTE: ohci@ff520000 doesn't actually work on hardware */
+
+	usb_hsic: usb@ff5c0000 {
+		compatible = "generic-ehci";
+		reg = <0xff5c0000 0x100>;
+		interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru HCLK_HSIC>;
+		clock-names = "usbhost";
+		status = "disabled";
+	};
+
 	gic: interrupt-controller@ffc01000 {
 		compatible = "arm,gic-400";
 		interrupt-controller;