The ACPI thermal driver creates extra sysfs attributes in its own
directory pointing to the thermal zone it is related to and add a
pointer to the sysfs ACPI thermal device from the thermal zone sysfs
entry.

This is very specific to this ACPI thermal driver, let's encapsulate
the related creation/deletion code to group it inside a function we
can identify later for removal if needed.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
[ rjw: Subject adjustment, removal of trailing white space ]
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>