Platform/Sgi: Add SMBIOS Type1 Table

Add the SMBIOS type 1 table (System Information) that includes
information about manufacturer, product name, version, serial number and
other information related to the system identification.

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>