SOFT: Add equalizer tuning scripts and small examples

This patch adds support to SOFT to setup FIR and IIR equalizer types.

The examples scripts for simple FIR loudness effect, IIR loudness effect
and speaker equalization case demonstrate the usage of the tool. The
output ".txt" files will be possible to apply with alsactl to setup
the equalizers in SOF.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
20 files changed