ASoC: sound_control: Rewrite cache reg logic

* Use cached reg to fetch locked value. Needs testing.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: limiter: Add override control for Min freq

* We override min freq if user changes or when device
  suspends.
* We do not override min freq when device resume because
  CPU boost may boost min freq at that time - we don't need
  to interfere.

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