[S390]: Add AF_IUCV socket support

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

This patch adds AF_IUCV socket support.

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/net/iucv/Kconfig b/net/iucv/Kconfig
index 45ecf0b..f8fcc3d 100644
--- a/net/iucv/Kconfig
+++ b/net/iucv/Kconfig
@@ -5,3 +5,11 @@
 	  Select this option if you want to use inter-user communication under
 	  VM or VIF sockets. If you run on z/VM, say "Y" to enable a fast
 	  communication link between VM guests.
+
+config AFIUCV
+	tristate "AF_IUCV support (VM only)"
+	depends on IUCV
+	help
+	  Select this option if you want to use inter-user communication under
+	  VM or VIF sockets. If you run on z/VM, say "Y" to enable a fast
+	  communication link between VM guests.