Ah, yes, that makes sense. The live distribution thingie somehow got me confused.
FWIW, I managed to compile the module for the Omnia and install it. The stick is scanning for channels as I type. Took me quite a bit to figure out the TurrisOS/OpenWRT build system but I finally succeeded.
If there’s any interest from others, I’d be interested to learn how I can help getting this into TurrisOS.
Well, the bad news is that although the tuner is recognised both by the kernel and mythtv, mythtv fails to find any channels. I’ll look into that some more, but maybe there’s a reason the driver is still in staging for kernel 4.4…
//EDIT:
Update: w_scan detects 3 of the 6 available muxes, so the driver seems to work in principle.