thermal: update the documentation

Update the documentation for the thermal driver hwmon sys I/F.

Change the ACPI thermal zone type to be consistent with hwmon.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index ec707ed..5e9641c 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -1136,7 +1136,7 @@
 
 	for (i = 0; i < ACPI_THERMAL_MAX_ACTIVE &&
 			tz->trips.active[i].flags.valid; i++, trips++);
-	tz->thermal_zone = thermal_zone_device_register("ACPI thermal zone",
+	tz->thermal_zone = thermal_zone_device_register("acpitz",
 					trips, tz, &acpi_thermal_zone_ops);
 	if (IS_ERR(tz->thermal_zone))
 		return -ENODEV;