DPE: Add new parameters for DeriveContext command

As per spec updates in v1.0 r9, add below new parameters to
DeriveContext command:
* return_certificate [input]
* allow_new_context_to_export [input]
* export_cdi [input]
* new_certificate [output]
* exported_cdi [output]

Signed-off-by: Maulik Patel <maulik.patel@arm.com>
Change-Id: If646caad314f38abcfcca267123aa5d3d477f156
12 files changed