[SIP/DIAMETER] Reinstate the lost dfilter_store_sip_from_addr() and use it
for 3GPP AVP 601 Public-Identity.

Change-Id: I5ef6608e7821779b00f79486860ee5f578828dfc
Reviewed-on: https://code.wireshark.org/review/5467
Reviewed-by: Anders Broman <a.broman58@gmail.com>