configs: Add initial value for mixers of ADSP SVA with Fluence

ADSP SVA with Fluence fails to detect keywords after audioserver restart.
Fix this issue by adding initial value for those mixers of ADSP SVA with
Fluence that don't have the default values.

Change-Id: Ie5caad45d61cfa7e833636a3e81717a996009367
1 file changed