I have no personal experience building for RaspberryPi but for the most part (with slight changes for some coins and assuming the coin has a "pro" file to work with) the build process is almost always the same and from what I can see on this guide (https://steemit.com/wallet/@cryptogodnl/how-to-install-any-qt-wallet-on-the-raspberry-pi), it SHOULD get you there.

If you encounter any errors while building, try using Google to investigate the error as it's typically just a missing dependency and if all else fails, sometimes just doing a simple "make clean" before re-running "make" works wonders.

If all else fails give me a shout and I'll see about building it for you.