ARM: dts: imx35.dtsi: change the clock information for usb

For imx35, it needs three clocks to let the controller work,
the old code is wrong, and the usbmisc does not include
clock handling code any more.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>