Hi Mike,
You can find the Linux driver for AD9361 (linux/ad9361.c at xcomm_zynq · analogdevicesinc/linux · GitHub) and the device tree for the Zed project (linux/zynq-zed-adv7511-ad9361.dts at xcomm_zynq · analogdevicesinc/linux · GitHub) on the GitHub.
However, on KC705 I guess that you are running no-OS. Can you try to do the same thing on the Zed and tell us the result?
Thanks,
Dragos