thermal: intel: int340x: Add locking to int340x_thermal_get_trip_type()

thermal: intel: int340x: Add locking to int340x_thermal_get_trip_type()

[ Upstream commit acd7e9ee57c880b99671dd99680cb707b7b5b0ee ]

In order to prevent int340x_thermal_get_trip_type() from possibly
racing with int340x_thermal_read_trips() invoked by int3403_notify()
add locking to it in analogy with int340x_thermal_get_trip_temp().

Fixes: 6757a7abe47b ("thermal: intel: int340x: Protect trip temperature from concurrent updates")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>