Issue with delay argument to nb_transport_fw/bw

[aynsley]

The delay argument to nb_transport_fw/bw is declared as an input, whereas the delay argument to b_transport is not an input, and is thus in effect a non-const reference. In SystemC TLM-2.0 the delay arguments to each of these calls are non-const, and are intended to be used in the same way for temporal decoupling with both blocking- and non-blocking transport.

The UVM implementation is in effect creating a difference in the timing annotation mechanism between the blocking- and non-blocking cases, which is not justified by the TLM-2.0 standard. So I guess that

- either this was not intentional, and should be fixed

- or was intentional, and should be documented accordingly

- or nobody cares and we should leave well alone