DPE: Initialise target_locality argument

If target_locality is not encoded in input, initialise it
to the LOCALITY_NONE (no locality). Also, set locality
for RoT context to be RSE Secure.

Signed-off-by: Maulik Patel <maulik.patel@arm.com>
Change-Id: Id3ab6f954c121a84c68c58e2fa6d27dce00f703b
3 files changed