FreeBSD will increase support as soon as someone with both the necessary skills to improve the support and access to the relevant hardware decides to spend some time working on it (either for their personal satisfaction, or because they need it for their business). The process is all voluntary, so feel free to dive right in, add the support yourself, and submit some patches.
Alternatively, you could pay someone with the relevant skills to implement the support and submit the patches for you.
The FreeBSD project will generally be happy to add the support as and when someone makes it available (and assuming that adding the support does not break something else, and is for one of the generally supported platforms). The only condition will be that it is working code for FreeBSD (it's no good just pointing at another *BSD project or Linux) and it should be made available under a BSD-style license.
