cpufreq: cpuboost: Make cpu boost driver aware of LCD events

* We previously removed "placebo" wake boost from intelli
  hotplug driver and stated we may add same to MSM Limiter
  driver.
* However, we already have good boost driver in place.
  So we use same to apply CPU boost whenever screen is
  turned on!
* Tested and worked well.

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

Conflicts:

	drivers/cpufreq/cpu-boost.c