ACPI: tables: PPTT: Populate cache-id if provided by firmware

ACPI 6.4 adds a 'cache id' to the PPTT Cache Type Structure.

Copy this property across into the cacheinfo leaf when it was
provided by firmware.

This value gets exposed to userspace as:
/sys/devices/system/cpu/cpu*/cache/index*/id.

See the "Cache IDs" section of Documentation/x86/resctrl.rst.

Co-authored-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>