Platform/Sgi: Add SMBIOS Type16 Table

Add the SMBIOS type 16 table (Physical Memory Array) describes a
collection of memory devices that operate together to form a memory
address. It includes information about number of devices, total memory
installed, error correction mechanism used and other related information.

Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>
Reviewed-by: Thomas Abraham <thomas.abraham@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>