feat(dice): add cert_id argument to dpe_derive_context()

This custom argument is meant to simplify to group
components into certificates. Components with
the same cert_id contribute to the same certificate
regardless of the load order or the structure of the
derivation tree. This argument aims to flatten the tree
structure and make it easy to include branches or
subtrees in the main derivation line.

Signed-off-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I83c4abc399616063a5eb04792d603899f7513627
4 files changed