ACPI: thermal: Fix up function header formatting in two places

Fix up the following formatting issues:
 * braces following function declarations should be on a new line
 * empty line should be present between function declarations

Signed-off-by: Jonathan Bergh <bergh.jonathan@gmail.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>