A
According to here technically 2708 is the family, and 2835 is a specific implementation.
So it comes down to snd_soc_hifiberry_dacplus.
According to here the vendor never mainlined its driver(s) it seems, so the driver is only available in the Raspberry Pi kernel tree…
So you could try to port the drivers or use the original raspi kernel 
RPMFusion maintains a rpi repo including userspace and kernels, but I never used it since the packages I tested were not signed. …which might be perfectly ok…
Edit: