Multicast group pre-creation for TopSpin old stack

[Yevgeny Kliteynik <kliteyn-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Sasha,

There's a hack in the SM to deal with TopSpin's non-compliant
join compmask for IPoIB v4 multicast group ff12:401b:<pkey>::1
The group is pre-defined and maintained as a well-known multicast
group.

opensm/osm_prtn.c:

   232          /* workaround for TS */
   233          /* FIXME: remove this upon TS fixes */
   234          mc_rec.mgid = osm_ts_ipoib_mgid;
   235          memcpy(&mc_rec.mgid.raw[4], &pkey, sizeof(pkey));
   236          /* Scope in MCMemberRecord (if present) needs to be consistent with MGID */
   237          mc_rec.scope_state = ib_member_set_scope_state(scope, IB_MC_REC_STATE_FULL_MEMBER);
   238          ib_mgid_set_scope(&mc_rec.mgid, scope);
   239
   240          status = osm_mcmr_rcv_find_or_create_new_mgrp(p_sa, comp_mask, &mc_rec,
   241                                                        &p_mgrp);
   242          if (p_mgrp) {
   243                  p_mgrp->well_known = TRUE;
   244                  if (!p->mgrp)
   245                          p->mgrp = p_mgrp;
   246          }

As far as I can tell, this was added before git history.
Any idea if it's still needed?

-- Yevgeny
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