out: cleanup Synapse conflicts

* We have pre-configured Synapse backend ready.
  Cleanup conflicting configurations.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
ASoC: sound_control: Fix PA Gain reset

* PA Gain registers should be volatile so that
  our settings override each time its brought up.

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