humility bankerase doesn't.

[cbiffle]

The humility bankerase command claims to erase a flash bank on the LPC55, in 32 kiB pages.

This is problematic for a few reasons.

1. The LPC55 doesn't have a concept of "flash banks." There is just flash.
2. The LPC55 has a 512B erase/programming granularity, not 32 kiB.
3. The command doesn't actually erase. It writes zeros. On the LPC55 in particular this is a very different state from erase.

Ran into this while attempting to use bankerase to prepare an RoT for remanufacturing -- the DICE key generation code distinguishes an erased identity cert from a programmed identity cert. So, despite its name, bankerase cannot be used to erase the cert.