power: Add ENERGY STAR logo based on udev information

For ENERGY STAR certification purposes, the ENERGY STAR logo must be
shown, there are three ways to do so:
 * Sticker on the chassis
 * Show logo for 5 seconds at boot
 * Show logo in power settings panel

The first two options are both undesirable (expensive sticker, longer
boot). As such, it makes sense to add support for this in g-c-c.