In efl there is a meson configure option for native-arch-optimization which does all kind of default optimizations depending on CPU you have. For arm, it adds few things seen in here:
https://git.enlightenment.org/core/efl.git/tree/meson.build?h=v1.24.1#n165
However not all arm CPUs include neon instruction set, such as tegra20. A bug was reported originally here:
https://bugs.gentoo.org/722552
I saw there were a couple of open tickets regarding arm-neon affairs, but nothing related to native-arch-optimization or meson.