arm: dts: lpc32xx: add USB clock controller

The change adds device node of LPC32xx USB clock controller and adds
clock properties to USB OHCI, USB device and I2C controller to USB phy
device nodes.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

arch/arm/boot/dts/lpc32xx.dtsi

@@ -92,6 +92,7 @@ ohci: ohci@0 {
 				compatible = "nxp,ohci-nxp", "usb-ohci";
 				reg = <0x0 0x300>;
 				interrupts = <0x3b 0>;
+				clocks = <&usbclk LPC32XX_USB_CLK_HOST>;
 				status = "disabled";
 			};
 
@@ -99,6 +100,7 @@ usbd: usbd@0 {
 				compatible = "nxp,lpc3220-udc";
 				reg = <0x0 0x300>;
 				interrupts = <0x3d 0>, <0x3e 0>, <0x3c 0>, <0x3a 0>;
+				clocks = <&usbclk LPC32XX_USB_CLK_DEVICE>;
 				status = "disabled";
 			};
 
@@ -106,10 +108,17 @@ i2cusb: i2c@300 {
 				compatible = "nxp,pnx-i2c";
 				reg = <0x300 0x100>;
 				interrupts = <0x3f 0>;
+				clocks = <&usbclk LPC32XX_USB_CLK_I2C>;
 				#address-cells = <1>;
 				#size-cells = <0>;
 				pnx,timeout = <0x64>;
 			};
+
+			usbclk: clock-controller@f00 {
+				compatible = "nxp,lpc3220-usb-clk";
+				reg = <0xf00 0x100>;
+				#clock-cells = <1>;
+			};
 		};
 
 		clcd: clcd@31040000 {