ACPI / lpat: Fix typos in comments and kerneldoc style

This patch fix the typos in function header of
acpi_lpat_raw_to_temp and acpi_lpat_temp_to_raw.

Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>