ipaq-sleep 0.9: Remove supposed fixes for all bugs except the most prominent one.

ipaq-sleep 0.9: Remove supposed fixes for all bugs except the most prominent one.
* Apparently, it was big, big mistake to touch this code. Code Police, thy curse
can't be lifted, let Perl be my witness!
* Leave only obvious fix (off-by one error) for #3540.
* Fixes #3586. (Well, it should. Noone really have reported that ipaq-sleep
does *not* use 100% of CPU time during its normal course of action.)
* This puts average latency of backlight coming back up after it was power-saved
and touch/keypress happens to 1 second (which was the matter of other fixes,
which reduced latency to ~0.2s).