For imx25, it needs three clocks to let the controller work,
the old code is wrong, and usbmisc has not included clock
handling code any more.
Tested-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>