feat(tc): add RSS SDS region right after SCMI payload

Add a second SDS region on the TC platform for communication with RSS.
RSS needs to share data with AP during early boot over shared memory
to support DPE. Reserve a memory region right after the SCMI secure
payload areas from unused memory.

Change-Id: I3a3a6ea5ce76531595c88754418602133a283c42
Signed-off-by: David Vincze <david.vincze@arm.com>
3 files changed