IB/ucm: Get rid of duplicate P_Key parameter

The P_Key is provided into a SIDR REQ in two places, once as a
parameter, and again in the path record.  Remove the P_Key as a
parameter and always use the one given in the path record.

This change has no practical effect on ABI functionality.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/include/rdma/ib_user_cm.h b/include/rdma/ib_user_cm.h
index a9e1b22..066c20b 100644
--- a/include/rdma/ib_user_cm.h
+++ b/include/rdma/ib_user_cm.h
@@ -200,7 +200,7 @@
 	__be64 sid;
 	__u64 data;
 	__u64 path;
-	__u16 pkey;
+	__u16 reserved_pkey;
 	__u8  len;
 	__u8  max_cm_retries;
 	__u8  reserved[4];