msm: cpufreq: Add frequency limiter driver

* This driver limits max frequency on suspend/resume.
* This driver can be used by other boards as well
  since it doesn't contain any function specific to
  msm board.
* We will convert pr_info to pr_debug once tested
  and reviewed.

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