Activate PowerOn LED pattern during startup

When booting to USER mode, the PowerOn LED pattern is activated on
mce startup and deactivated on init done.

[mce] Activate PowerOn LED pattern during startup
Tune hybris led pattern configuration

PowerOn = white
BatteryCharging = orange
BatteryFull = green
SoftOff = cyan (so it will not conflict with BatteryFull)
Merge pull request #82 from spiiroin/startup_led

Activate PowerOn LED pattern during startup