RDMA/cxgb3: Don't post TID_RELEASE message

The LLD does this for us in cxgb3_remove_tid().

Also fixed active open failure cases where we also shouldn't be
releasing the TID.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>