Fro Volumio 2 there is no more support, not for any Odroid.
With Volumio 3, support for C1/C2 has been dropped a while ago.
You can still download a latest version, untested, unsupported, when it works you are lucky. There will be no more updates.
See the summary here: Unofficial Volumio 3 on Odroid boards (C4/ N2/ N2+)