gbproxy: (Re)allocate SGSN-side PTP BVC even if CELL already exists

After a SGSN-side RESET of the SIG-BVC, all PTP BVC on the SGSN side
are gone.  However, the CELLs and the BSS side BVCs continue to exist
(as there may be other SGSNs).

So if a PTP-BVC RESET from the BSS side arrives in such a situation,
and we can find a matching CELL, we still need to check if we need
to create any SGSN-side PTP BVCs instead of simply being happy with
the CELLs already existing.

Change-Id: I1d1562e421082fa4399c73ac31290e4c95718e49
Closes: OS#4903
1 file changed