RDS: Drop stale iWARP RDMA transport

RDS iWarp support code has become stale and non testable. As
indicated earlier, am dropping the support for it.

If new iWarp user(s) shows up in future, we can adapat the RDS IB
transprt for the special RDMA READ sink case. iWarp needs an MR
for the RDMA READ sink.

Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/Kconfig b/net/rds/Kconfig
index f2c670b..bffde4b 100644
--- a/net/rds/Kconfig
+++ b/net/rds/Kconfig
@@ -4,14 +4,13 @@
 	depends on INET
 	---help---
 	  The RDS (Reliable Datagram Sockets) protocol provides reliable,
-	  sequenced delivery of datagrams over Infiniband, iWARP,
-	  or TCP.
+	  sequenced delivery of datagrams over Infiniband or TCP.
 
 config RDS_RDMA
-	tristate "RDS over Infiniband and iWARP"
+	tristate "RDS over Infiniband"
 	depends on RDS && INFINIBAND && INFINIBAND_ADDR_TRANS
 	---help---
-	  Allow RDS to use Infiniband and iWARP as a transport.
+	  Allow RDS to use Infiniband as a transport.
 	  This transport supports RDMA operations.
 
 config RDS_TCP