I had the same problem when building ffmpeg for a desktop. In my case
ffmpeg was looking for the freetype2 headers in /usr/include/freetype
instead of /usr/include/freetype2.
This solution is ugly, but I created a symlink
sudo ln -s /usr/include/freetype2/
Then ./configure was succesfull.
You might be able to achieve the same by patching ffmpeg to replace all
It looks like this is just in
Since you appear to be building for a different CPU you may need to
modify the paths with the proper location for freetype2 for your