usb: cdnsp: : add scatter gather support for ISOC endpoint

Patch implements scatter gather support for isochronous endpoint.
This fix is forced by 'commit e81e7f9a


("usb: gadget: uvc: add scatter gather support")'.
After this fix CDNSP driver stop working with UVC class.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20221222090934.145140-1-pawell@cadence.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>