Yeah, good question, no error reporting. The overlay appears to load but nothing, right? Join the club, you can find many threads dealing with this issue.
Seem the legacy device tree overlays don’t work with the new kernels. You may need to re-write the overlay.
Has anyone found the documentation for these needed device tree overlay changes?
Check out this thread.
https://forum.beagleboard.org/t/problem-setting-pin-modes-and-configurations-using-a-device-tree-overlay