msm: limiter: Simplify and debugify min/max freq

* 5echo2@xda reported that sibling cores may or may not
  get updated with required max freq after every resume
  operation.
* This patch make use of hooks added in cpufreq driver.
  These hooks save desired min/max freq if CPU is
  offline OR update min/max freq if CPU is online
  and thus sibling cores will have their proper scaling
  frequencies updated whenever called.
* Also live_min_freq and live_max_freq are added per-cpu
  to help user retrieve actual min/max per cpu.

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