docs/s390x: fix vfio-ccw type

Fix the type name in the mdevctl example.

Signed-off-by: Cornelia Huck <[email protected]>
Reviewed-by: Eric Farman <[email protected]>
Message-Id: <[email protected]>

Author: cohuck

docs/system/s390x/vfio-ccw.rst

@@ -29,7 +29,7 @@ automatically, use
 
    [root@host ~]# driverctl -b css set-override 0.0.0313 vfio_ccw
    [root@host ~]# mdevctl define -u 7e270a25-e163-4922-af60-757fc8ed48c6 \
-                  -p 0.0.0313 -t vfio-ccw_io -a
+                  -p 0.0.0313 -t vfio_ccw-io -a
 
 If using ``mdevctl`` is not possible or wanted, follow the manual procedure
 below.