Synchronize bsp nanbield branch with cassini nanbield-dev branch

The purpose of MR is to synchronize the meta-cassini nanbield branch with the cassini nanbield branch. There are no new files or contributions from meta-cassini in this MR. This branch is a sliced version of meta-cassini-bsp from the public meta-cassini nanbield-dev branch.

clear everything except meta-cassini-bsp (commits) $ git filter-repo --path meta-cassini-bsp/

clear everything except meta-cassini-bsp and change root $ git filter-branch --subdirectory-filter meta-cassini-bsp -- --all