Handle requests to read and write permanent product attributes

This patch adds commands to store permanent product attributes in RPMB.
Permanent attributes can only be written once, but can always be read by
a non-secure client. A hash of the permanent attributes MUST be verified
against write-once hardware.

Bug: 33051168
Test: manual test on imx6ul

Change-Id: I5c8bdb2302e763a588e3574f070da4dbc4803918
7 files changed