Use the VFIO_CCW() QOM type-checking macro to avoid DO_UPCAST().
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230213170145.45666-7-philmd@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>