kernel: Reduce dmesg spam

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>
wcd9320: Enable class AB mode always