ARM: at91/dt: fix USB high-speed clock to select UTMI

The UTMI clock must be selected by any high-speed USB IP. The logic behind it
needs this particular clock.
So, correct the clock in the device tree files affected.

Reported-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: <stable@vger.kernel.org> #3.18

arch/arm/boot/dts/sama5d4.dtsi

@@ -260,7 +260,7 @@
 			compatible = "atmel,at91sam9g45-ehci", "usb-ehci";
 			reg = <0x00600000 0x100000>;
 			interrupts = <46 IRQ_TYPE_LEVEL_HIGH 2>;
-			clocks = <&usb>, <&uhphs_clk>, <&uhpck>;
+			clocks = <&utmi>, <&uhphs_clk>, <&uhpck>;
 			clock-names = "usb_clk", "ehci_clk", "uhpck";
 			status = "disabled";
 		};