in practice this has not been a useful indicator, and we
have stabilized the SVD format so that changes in the code don't
cause the SVD files to go incompatible anymore.
this should make maintenance a bit easier going forward, hopefully.
also merge in cramium support to harmonize the forks for easier
cross-patches in the future.
resurrecting some old hardware as an efuse testing target;
new hardware is too precious at the moment given the ridiculous
shortage of FPGAs on the market.