Revert "cpufreq: interactive: Add target_loads_down freq selection"

This was providing a small improvement but not enough to justify
diverging so much from everyone else.

This reverts commit ce793a73d37a479a2952a09921c27f75e6ff5eb5.

Change-Id: I89793cc6c5891118df47395300749a4b61ecca19
cpu-boost: Sanitize and warn on boost problems

If a core is ever unplugged while a boost is active, there is a
chance that we would leave it in a boosted state when it is
restored.

Add warnings to ensure we don't try to remove a boost that doesn't
exist (indicates a boot_rem was run on the wrong core) and
if we ever start a core that has boosts enable then warn and
clear the boosts.

Change-Id: I8869afe3b2efa744a0ea012fb249ac7b7770acce