SUNRPC: Add RDMA dependency to SUNRPC_XPRT_RDMA

Add a dependency on RDMA before enabling SUNRPC_XPRT_RDMA
Yes, "INFINIBAND" also turns on iWARP and other RDMA support.

Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/Kconfig b/fs/Kconfig
index b9808bb..860ea8d 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1730,7 +1730,7 @@
 
 config SUNRPC_XPRT_RDMA
 	tristate "RDMA transport for sunrpc (EXPERIMENTAL)"
-	depends on SUNRPC && EXPERIMENTAL
+	depends on SUNRPC && INFINIBAND && EXPERIMENTAL
 	default m
 	help
 	  Adds a client RPC transport for supporting kernel NFS over RDMA