Lpass-side enablement of new WSA feature.
Configure PBR registers based on WSA bat_cfg/rload/sys_gain.
Some registers updated during init, others during enable_interpolator.
Change-Id: Iac42672182827a9da47700319c61b9d0a17d0936
Signed-off-by: Matthew Rice <quic_mrice@quicinc.com>