RC:
One of the things that people don't understand about the AD9361 & AD9364 is there is not "one" register settings that will work across multiple parts. Each part is unique, and part of the drivers read auxiliary/calibration ADCs, do some math, and write register values back out to auxiliary/calibration DACs.
There is no way to have one register values to rule them all. This isn't Mordor.
Each part is unique, and needs a unique register setting.
Use the drivers. Many people have ported them to a small MCU that sits beside the AD9361 if you want a non-CPU based FPGA.