usb: misc: usb3503: Fix up whitespace

Remove an erroneous tab that should be a space.
Signed-off-by: NJulius Werner <jwerner@chromium.org>
Signed-off-by: NDongjin Kim <tobetter@gmail.com>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>