Proposal for caching/buffering POST codes list for one boot process.

[Tanous, Ed]

Would it make more sense to simply include multiple post code paths on dbus?

/xyz/openbmc_project/host/post/current
/xyz/openbmc_project/host/post/1
/xyz/openbmc_project/host/post/2

This would allow the interface itself to define an arbitrary number of post code collections, rather than just previous and current.  Initially, previous and current is likely all we need, but in the future, it might be good to store more.