Ok, ho dato un'occhiata su xda ed è effettivamente come pensavo, basta aggiungere solo "ipv6" nel file /data/local/modules
kernel modules
Loading kernel modules is done by editing /data/local/modules file. If you want to enable for example ipv6 support, you have to edit this file adding "ipv6" (without absolute path and any suffixes) to it. The same goes for other modules too. Modules are added separated by spaces.