[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/include/linux/socket.h b/include/linux/socket.h
index 92cd38e..fcd35a2 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -187,7 +187,8 @@
 #define AF_LLC		26	/* Linux LLC			*/
 #define AF_TIPC		30	/* TIPC sockets			*/
 #define AF_BLUETOOTH	31	/* Bluetooth sockets 		*/
-#define AF_MAX		32	/* For now.. */
+#define AF_IUCV		32	/* IUCV sockets			*/
+#define AF_MAX		33	/* For now.. */
 
 /* Protocol families, same as address families. */
 #define PF_UNSPEC	AF_UNSPEC
@@ -220,6 +221,7 @@
 #define PF_LLC		AF_LLC
 #define PF_TIPC		AF_TIPC
 #define PF_BLUETOOTH	AF_BLUETOOTH
+#define PF_IUCV		AF_IUCV
 #define PF_MAX		AF_MAX
 
 /* Maximum queue length specifiable by listen.  */