Interactive governor: various patches

- Backported from 3.4
- Manually merged and adapted from codeaurora repo

Change-Id: I88812736b4c5d3fb0113ed68cfd8994e711f234a
Led notifications: enabled led blinking and sysfs attributes

A bit hackish, but for the moment will do. I'll polish and beautify it
when i'll have some more time :)

It's required to use the patched liblights in star-common

Change-Id: I4bb797d0578d860f7278ea3b3be6e457f135f628