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: NNicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: NBo Shen <voice.shen@atmel.com>

arch/arm/mach-at91/clock.c

@@ -742,8 +742,7 @@ static void __init at91_upll_usbfs_clock_init(unsigned long main_clock)
 	/* Now set uhpck values */
 	uhpck.parent = &utmi_clk;
 	uhpck.pmc_mask = AT91SAM926x_PMC_UHP;
-	uhpck.rate_hz = utmi_clk.rate_hz;
-	uhpck.rate_hz /= 1 + ((at91_pmc_read(AT91_PMC_USB) & AT91_PMC_OHCIUSBDIV) >> 8);
+	uhpck.rate_hz = at91_usb_rate(&utmi_clk, utmi_clk.rate_hz, usbr);
 }
 
 static int __init at91_pmc_init(unsigned long main_clock)