powersuspend: add LCD screen on/off hooks (Yank555.lu)

- add an alternative hook for screen on / off detection in the display
  pannel driver
- sleeps  ~0.1s sooner, wakes up ~1s later then autosleep
- clean up source formatting a bit (Paul Reioux)

Signed-off-by: Paul Reioux <reioux@gmail.com>
powersuspend: minor typo fix

:D
http://en.wikipedia.org/wiki/Panel

404
http://en.wikipedia.org/wiki/Pannel
mdss: add powersuspend hooks

Only applicable for ks01lte
powersuspend: default to display hooks
powersuspend: active from panel, inactive from autosleep

Swap panel's inactive command with autosleep's one.

Autosleep can make powersuspend state to inactive faster than panel mode.