The loader grew a lot of hair over the past few months as it
was abused as a baremetal environment for chip bring-up.
A baremetal environment was explicitly created to help with that,
so we don't have to pollute the loader with lots of unused features
and ancilliary code.
Furthermore, a decision was made to eliminate updates from the
loader code base - the loader is just for setting up Xous. This
allows the loader to be more platform-agnostic.
Boot1 instead contains all the platform-specific code for doing updates.
For completeness, we note that boot0 is a minimal piece of code that is the
first step in the chain of trust and is intended to be a read-only
segment of code that has public keys baked into it that are used
to bootstrap the rest of the ecosystem.
At this point, the loader is now slimmed down and runs. Still needs
testing to make sure the culling wasn't too aggressive, but I am
much happier with where this is landing as the loader is once again
just focused on getting Xous up and running.
The code base had evolved through several code names, interim
names, company names and chip names that alternatively did or did
not exist.
Baochip is the definitive name of the company, and the Baochip1x
(full part number BAO1X2S4F-WA) is the definitivey part number of
the SoC. For convenience, the part number is shortened to 'bao1x'
in most feature flags and variable references.
This commit fixes all of the odd names and removes some unmaintained
early targets.
