It’s been discussed to move all HAL code to the RSB (RTEMS Source Builder) and removing it from the RTEMS source tree completely.
They change too rapidly and different versions can have different support with users wanting to update. The best choice is to move to using this method and using a release file that can be easily updated.
This is where we’re going in the future with this if you’re interested you can try doing it this way it’s fairly easy and there are a lot of examples on how to do this.