usb: gadget: r8a66597-udc: remove useless cast for driver.name

device_driver name is const char pointer, so it not useful to cast
udc_name (which is already const char).

Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Link: https://lore.kernel.org/r/1582054383-35760-14-git-send-email-clabbe@baylibre.com


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