msm: cpufreq: Add frequency limiter driver
msm: limiter: Update path

* Attributes are created at /sys/kernel/msm_limiter/*

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: Improve logic and formatting

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: Cleanup debug prints

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: Increase constraints prior changing limits

* In very rare instance, resume function causes wdog to reset
  on MSM board and hence a reboot.
* So let resume function execute and restore limits only if
  required.
* Increase suspend defer time to 10 seconds.
  (which is same as that of MSM Hotplug)

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter, optimized suspend and resume frequency for falcon
msm: limiter: Add enable switch and use workqueues

* In case user wish to use external app to set
  min-max frequencies, we should not override.
* Use high priority workqueues for limit work.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: Fix updation waiting for next cycle

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: enabled by default