cpufreq: interactive: cleanup and small fixes

Move the tunables from __init to default.
Also apply a above_highspeed_delay whenever increasing
speed to a new speed above highspeed (not just the first
step above highspeed).

Change-Id: I72972e5a87090e34339207f71853a246fa234085
Signed-off-by: Blechd0se <alex.christ@hotmail.de>
Add dynamic fsync-/fsync-toogle

echo 1 > /sys/class/misc/fsynccontrol/fsync_enabled
Enable for fsync always on.

echo 1 > /sys/kernel/dyn_fsync/Dyn_fsync_active
Enable for dynamic fsync.

Change-Id: Id6311c87fece474b8eec9edeb22da101260b2404
Signed-off-by: Blechd0se <alex.christ@hotmail.de>