net/rds: Fix new sparse warning

c0adf54a introduced new sparse warnings:
  CHECK   /home/dahern/kernels/linux.git/net/rds/ib_cm.c
net/rds/ib_cm.c:191:34: warning: incorrect type in initializer (different base types)
net/rds/ib_cm.c:191:34:    expected unsigned long long [unsigned] [usertype] dp_ack_seq
net/rds/ib_cm.c:191:34:    got restricted __be64 <noident>
net/rds/ib_cm.c:194:51: warning: cast to restricted __be64

The temporary variable for sequence number should have been declared as __be64
rather than u64. Make it so.
Signed-off-by: David Ahern <david.ahern@oracle.com>
Cc: shamir rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/ib_cm.c

@@ -188,7 +188,7 @@ void rds_ib_cm_connect_complete(struct rds_connection *conn, struct rdma_cm_even
 		 * Since dp_ack_seq is 64-bit extended load operations can be
 		 * used so go through get_unaligned to avoid unaligned errors.
 		 */
-		u64 dp_ack_seq = get_unaligned(&dp->dp_ack_seq);
+		__be64 dp_ack_seq = get_unaligned(&dp->dp_ack_seq);
 
 		if (dp_ack_seq)
 			rds_send_drop_acked(conn, be64_to_cpu(dp_ack_seq),