usb: gadget: pxa27x_udc: prepare and unprepare the clock
usb: gadget: pxa27x_udc: prepare and unprepare the clock

Add clock prepare and unprepare as required by clock framework.

Signed-off-by: Robert Jarzmik <94b2a0a74cb42a2dd0cf1b763601af7f13907aa9@free.fr>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs