Prior to 12L:
- values: sbh links to sbh_port
- values-land: sbh links to sbh_land
However, in 12L this was flipped around:
- values: sbh_port links to sbh
- values-land: defines sbh standalone
To fix for 12L without breaking them for prior versions, break the link and define each of them
Also, while we're at it, remove a few links in my own overlays, as they might break similarly in the future
Change-Id: Ib4d1896599f47a39274c4930fd765891bf143f7d