Audio: Crossover: Fix a mistake in s32 processing core

The filters state need to be retrieved for every channel as
it is done in other s16 and s24 processing cores. The mistake
caused very distorted sound with waveform discontinuity every
copy period, e.g. 1 ms.

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

Author: singalsu

src/audio/crossover/crossover_generic.c

@@ -229,7 +229,7 @@ static void crossover_s32_default(struct comp_data *cd,
 
 	for (ch = 0; ch < nch; ch++) {
 		idx = ch;
-		state = &cd->state[0];
+		state = &cd->state[ch];
 		for (i = 0; i < frames; i++) {
 			x = audio_stream_read_frag_s32(source_stream, idx);
 			cd->crossover_split(*x, out, state);