[S390]: Adapt netiucv driver to new IUCV API

Adapt netiucv network device driver to new IUCV API
Signed-off-by: NFrank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>