audio: src: free copied coefficients

Until now SRC was relying on the final module clean up to free
copied with fast_get() coefficients. This however isn't clean. Fix it
and release partitions explicitly.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

Author: lyakh

src/audio/src/src_common.c

@@ -689,6 +689,10 @@ __cold int src_free(struct processing_module *mod)
 
 	comp_info(mod->dev, "entry");
 	mod_free(mod, cd->delay_lines);
+#if CONFIG_FAST_GET
+	mod_fast_put(mod, a->stage1->coefs);
+	mod_fast_put(mod, a->stage2->coefs);
+#endif
 	mod_free(mod, cd);
 
 	return 0;