cpufreq: cpuboost: Switch to CAF version

* This change is under review.
* CAF version uses thread structure  for thread migration.
* Remove additional checks.
* After testing, unified hotplug boost is working great,
  so enable by default.
* Load based sync is enabled by default as well.
* Add debug prints to let devs debug and check.
* CAF default for migration threshold is 15 which seems
  way small, use 30 instead.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Conflicts:

	drivers/cpufreq/cpu-boost.c