Revert "usb: gadget: udc-xilinx: replace memcpy with memcpy_toio"

Revert "usb: gadget: udc-xilinx: replace memcpy with memcpy_toio"

This reverts commit 9d61b21d46ed8127d149dc78e5ab428bdcfb2650 as it
throws up a bunch of sparse warnings as reported by the kernel test
robot.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202209020044.CX2PfZzM-lkp@intel.com
Fixes: 9d61b21d46ed ("usb: gadget: udc-xilinx: replace memcpy with memcpy_toio")
Cc: stable@vger.kernel.org
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Piyush Mehta <piyush.mehta@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>