Is the neural compute stick 2 (NCS2) natively compatible with an ARM cortex-A15 running Linux? If not, is it in your plan to support this kind of platform soon? If not, how much time would it take to modify the open-source drivers and make it work?
The Intel OpenVINO toolkit has support for the Raspberry Pi 3, take a look at the installation guide. However, I don't believe it is currently supported with the ARM cortex-A15. I recommend taking a look at the computer vision hardware page and posting your question on the Computer Vision forum.