ALSA: hda - Fix switching between dmic and mic using the same mux on IDT/STAC

Fix bug in switching between dmic and mic when both use the same mux.
Signed-off-by: Vitaliy Kulikov  <Vitaliy.Kulikov@idt.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -3481,8 +3481,10 @@ static int stac92xx_auto_create_dmic_input_ctls(struct hda_codec *codec,
 				return err;
 		}
 
-		if (snd_hda_get_bool_hint(codec, "separate_dmux") != 1)
+		if (snd_hda_get_bool_hint(codec, "separate_dmux") != 1) {
 			snd_hda_add_imux_item(imux, label, index, NULL);
+			spec->num_analog_muxes++;
+		}
 	}
 
 	return 0;