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

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

This reverts commit c222b46058d405e28159fa9c0c399b90bcbd8f9b 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: c222b46058d4 ("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>