[TF-A] Trusted Substrate architecture call: HandOverBlocks discussion

Hi

following a mail discussion on trusted-firmware A we will have a discussion on HOBs during this week's Trusted Substrate http://trusted-substrate.orgarchitecture council call https://linaro-org.zoom.us/j/94563644892.

In addition to mail thread, here is a deck https://docs.google.com/presentation/d/1KyqkyqoGXHUynZSI2hRFBoO_P7sFwgUJWhjW-Vm2SNk/edit?usp=sharing I'll use to start things up.

Cheers

FF