thermal: intel: pch_thermal: Use thermal driver device to write a trace

The pch_critical() callback accesses the thermal zone device structure
internals, it dereferences the thermal zone struct device and the 'type'.

Use the available accessors instead of accessing the structure directly.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/thermal/intel/intel_pch_thermal.c

@@ -127,7 +127,8 @@ static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp)
 
 static void pch_critical(struct thermal_zone_device *tzd)
 {
-	dev_dbg(&tzd->device, "%s: critical temperature reached\n", tzd->type);
+	dev_dbg(thermal_zone_device(tzd), "%s: critical temperature reached\n",
+		thermal_zone_device_type(tzd));
 }
 
 static struct thermal_zone_device_ops tzd_ops = {