ACPI / video: constify ACPI and DMI id tables

Make the video ACPI device ID array static and constify the DMI system
IDs array.  Saves us a little bit of code.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>