Revert "cpufreq: interactive: Add target_loads_down freq selection"

This reverts commit 2a621ebab975289560fd39b6a39f4271152c8b1a.
Revert "cpufreq: interactive: Allow go_hispeed to be disabled"

This reverts commit c11045028727b1f539a8df73576b91e65d181682.
cpufreq: interactive: Support variable frequency calculations

Use a threshold value up to which we are evaluating the current
speed weighted by current load against each new choice of speed.
Above switch to the original frequency calculation proportional to
load relative to the max possible frequency which allows for more
dynamic and fair changes.

Default threshold is cpuinfo min which guarantees minimal freqs
and energy usage during (offloaded) media playback.

Also, choose the highest frequency below or at target, which
generally saves us one freq level.

Change-Id: Ic807cc89a6d5cfb47f353b0912ced489baae8cbf
Sultan_defconfig: v1.0.0N