Tools: Tune: Multiband-DRC: Add comment about generator script

This patch helps to find the right tool to create the setup blobs.

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

Author: singalsu

tools/tune/multiband_drc/example_multiband_drc.m

@@ -139,7 +139,7 @@ function export_multiband_drc(prm)
 				      endian, 4);
 
 tplg_write(tplg1_fn, blob8, "MULTIBAND_DRC");
-tplg2_write(tplg2_fn, blob8_ipc4, "multiband_drc_config", 'Exported Control Bytes');
+tplg2_write(tplg2_fn, blob8_ipc4, "multiband_drc_config", "Exported with script example_multiband_drc.m");
 blob_write(blob3_fn, blob8);
 alsactl_write(alsa3_fn, blob8);
 blob_write(blob4_fn, blob8_ipc4);