We've revised generic test list (platform/factory/py/test/test_lists/generic_*) few times. With JSON test list, we're now sharing generic_common but most projects are still defining their own SMTItems, FATItems, and FFTItems.

I think we should try to look at existing projects and try to find common items, to revise *Items so it's easier for new projects to start their test plan.

BTW, for different form factors we may even define individual test lists like

  generic_chromebox.test_list.json
  generic_clamshell.test_list.json
  generic_detachable.test_list.json
  generic_convertible.test_list.json

If needed, there can also be SOC-specific items like
  
  chipset_XXX.test_list.json  (the XXX should follow src/overlays/chipset-*), and
  baseboard_YYY.test_list.json (the YYY should follow src/overlays/baseboard-*)

So each project may try to override from correct parents.