ARM: at91/PMC: use at91_usb_rate() for UTMI PLL

We are using this function, now that we have introduced
the support for UTMI clock for computing the USB host rate.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Bo Shen <voice.shen@atmel.com>
1 file changed