[S390]: Rewrite of the IUCV base code, part 2

Add rewritten IUCV base code to net/iucv.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 7729ca1..46f2d45 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -179,6 +179,7 @@
 # CONFIG_XFRM_USER is not set
 # CONFIG_XFRM_SUB_POLICY is not set
 CONFIG_NET_KEY=y
+CONFIG_IUCV=m
 CONFIG_INET=y
 CONFIG_IP_MULTICAST=y
 # CONFIG_IP_ADVANCED_ROUTER is not set