I doubt there's a hardware solution to this, and if there were one, it's likely to cause a decrease in image quality. Software is your solution, here.
From the DJI website for the Phantom 2 Vision minidrone:
A lens profile released by Adobe for DJI Phantom 2 Vision's camera
can be used to remove lens distortion
DJI keeps it here:
This would require that you use post-processing software that understands adobe lens profiles (e.g., Lightroom), but that would probably be the fastest, easiest way to batch-process a number of photos to remove the distortion of the lens, particularly if you're shooting in DNG.