Deactivate IPv6 UE IP PFCP IEs
Fixes
Disable IPv6 UE IP address in PFCP PDR. There is an issue either in the PFCP layer or in the SMF PDU session. The IPv6 IP address is encoded wrong.
I decided to just disable IPv6 in smf_procedure.cpp
, as we do not support IPv6 PDU sessions anyway for the time being.