GTPv2: Presence-Reporting-Area-Elements-List do full dissection of ECGI
and TAI.

Change-Id: I95d9ebf1d6f4eabe30b557fdc937d56006f8b123
Reviewed-on: https://code.wireshark.org/review/4593
Reviewed-by: Anders Broman <a.broman58@gmail.com>