Commit bbd1b70639f785a970d998f35155c713f975e3ac upstream.

ACPI 6.3 adds a flag to the CPU node to indicate whether
the given PE is a thread. Add a function to return that
information for a given linux logical CPU.
Signed-off-by: NJeremy Linton <jeremy.linton@arm.com>
Reviewed-by: NSudeep Holla <sudeep.holla@arm.com>
Reviewed-by: NRobert Richter <rrichter@marvell.com>
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NWill Deacon <will@kernel.org>
[jpg: backport for 4.19, replace acpi_pptt_warn_missing()]
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>