arch_topology: Use the last level cache information from the cacheinfo

The cacheinfo is now initialised early along with the CPU topology
initialisation. Instead of relying on the LLC ID information parsed
separately only with ACPI PPTT elsewhere, migrate to use the similar
information from the cacheinfo.

This is generic for both DT and ACPI systems. The ACPI LLC ID information
parsed separately can now be removed from arch specific code.

Tested-by: Ionela Voinescu <ionela.voinescu@arm.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>