Platform/Sgi: ACPI PPTT table for RD-E1-Edge

Processor Properties Topology Table (PPTT) to describe the topological
structure of Processors as a hierarchical tree. PPTT also describes the
Cache private to each node in the hierarchy, and the vendor specific
information regarding the SoC package.

Change-Id: I781629c1359bf438a4f3656d17e1d6527e77561f
Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>