product/rdn2: add configuration data for sds service module

SDS module is used to pass runtime data from SCP firmware to the
firmware on AP core using shared memory. Provide the base address
and size for the same and also the payloads to be passed.

Change-Id: I1682e325f19e8d94932012d9588c927427c79a6e
Signed-off-by: Aditya Angadi <aditya.angadi@arm.com>