Per Mike's testing, this is now resolved by pushing more recent images to Releases that enable hwe-u in Trusty for PPC64EL.
So from the initial bug point of view, this is fixed and could be marked as such.
However, as this also affects everything that's NOT ppc64el, I'd suggest leaving it open until such time as the images have been tested and pushed for the other archs as well.
Per Mike's testing, this is now resolved by pushing more recent images to Releases that enable hwe-u in Trusty for PPC64EL.
So from the initial bug point of view, this is fixed and could be marked as such.
However, as this also affects everything that's NOT ppc64el, I'd suggest leaving it open until such time as the images have been tested and pushed for the other archs as well.