smbios: copy_smbios_30() function

smbios: copy_smbios_30() function

Add new copy_smbios_30() function, that will be used to support
SMBIOS 3.0 entry points.

The SMBIOS 3.0 entry point will be tracked in a separate
SMBios30Addr variable, because both 2.1 and 3.0 entry points may
exist at the same time.

Adjust the smbios_get_tables(), smbios_major_version(), and
smbios_minor_version() helpers to use the SMBIOS 3.0 entry point
if available.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>