From: Jennifer Hunt <jenhunt@us.ibm.com>

This patch adds AF_IUCV socket support.
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>