fix tilapia/grouper kenel sync issue

if you want to try again in a way that doesn't switch from cm's to faux's kernels every time someone lunches tilapia then grouper,
then make sure you to cover all of the affected devices on your manifest commit.

... this happens _every_ time...

Revert "grouper: track faux's kernel (1/2)"

This reverts commit ecd9f7940572dfd71497f420110bf2f5587e5d26.