virtio: Fix typo in register_virtio_device() doc comment

Corrected "suceess" to "success" in the function documentation
for clarity.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20250529084350.3145699-1-alok.a.tiwari@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>