acpi: thermal: Add EOL to the trip_point_N_type strings

Make the trip_point_N_type sysfs files return a string ending in EOL for
consistency with other sysfs files.

Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>