mux: ignore active sink on other pipeline

When mux is on capture pipeline, sinks could not be active/paused when
processing COMP_TRIGGER_STOP command. However, active sink could be on
another pipeline and should be ignored or the pipeline task will not
exit and cause DSP panic if the core running the task is disabled
later.

PCMP ----> smart_amp ----> SSP(A)  # playback ppl
             ^
             |
PCMC <---- demux <----- SSP(B)     # echo reference ppl

Signed-off-by: Brent Lu <brent.lu@intel.com>

src/audio/mux/mux.c

@@ -794,7 +794,9 @@ static int mux_sink_status_count(struct comp_dev *mux, uint32_t status)
 							source_list);
 		struct comp_buffer __sparse_cache *sink_c = buffer_acquire(sink);
 
-		if (sink_c->sink && sink_c->sink->state == status)
+		/* ignore active sink on other pipeline */
+		if (sink_c->sink && sink_c->sink->state == status &&
+		    sink_c->sink->pipeline->pipeline_id == mux->pipeline->pipeline_id)
 			count++;
 		buffer_release(sink_c);
 	}