Platform/Sgi: Add SMBIOS Type7 Table

Add the SMBIOS type 7 table (Cache Information) that includes
information about cache levels implemented, cache configuration, ways of
associativity and other information related to cache memory installed.

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>