After I found that X12 was missing from the VTY config, make sure that
no timers have been forgotten in lcs_ta_req.c: change the default
timeout to -1. We will notice missing timers during testing.
Change-Id: I7c0b098622548bf0f0374c304522e6a9db0331e3
Originally, the lchan stored only the Timing Advance from the initial
channel request, hence it was called rqd_ta.
Since quite a while now, rqd_ta also stores the most recent Timing
Advance from each received Measurement Report. So rename to last_ta.
This is cosmetic preparation for an upcoming patch that clarifies
whether the Timing Advance is already known for Channel Activation.
Change-Id: I1049526a173819baeb4978db5bf018ba3f1006a0
Neels Hofmeyr
Neels Hofmeyr