[AF_IUCV]: Improve description of IUCV and AFIUCV configuration options.

Signed-off-by: NJennifer Hunt <jenhunt@us.ibm.com>
Signed-off-by: Ursula Braun >braunu@de.ibm.com>
Acked-by: NFrank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/iucv/Kconfig

 config IUCV
-	tristate "IUCV support (VM only)"
+	tristate "IUCV support (S390 - z/VM only)"
 	depends on S390
 	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
+	  Select this option if you want to use inter-user communication
+	  under VM or VIF. 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)"
+	tristate "AF_IUCV support (S390 - z/VM only)"
 	depends on IUCV
 	help
 	  Select this option if you want to use inter-user communication under