reduce RAM footprint of dsp processor and add a simple EQ (bass, treble) to dsp processor

dsp processor now will process smaller chunks of audio at a time and loop over the audio data array
which results in a much smaller RAM usage but probably longer execution times
of IIR filters.

Signed-off-by: Karl Osterseher <karli_o@gmx.at>

components/dsp_processor/include/dsp_processor.h

@@ -6,7 +6,8 @@ typedef enum dspFlows {
   dspfBiamp,
   dspf2DOT1,
   dspfFunkyHonda,
-  dspfBassBoost
+  dspfBassBoost,
+  dspfEQBassTreble,
 } dspFlows_t;
 
 enum filtertypes {