ALSA: hda - Set function_id only on FG nodes

(Re)set function_id only from the value on FG nodes.
The current code overrides the value with the last widget.

Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/hda/hda_codec.c

···
  */
 static void /*__devinit*/ setup_fg_nodes(struct hda_codec *codec)
 {
-	int i, total_nodes;
+	int i, total_nodes, function_id;
 	hda_nid_t nid;
 
 	total_nodes = snd_hda_get_sub_nodes(codec, AC_NODE_ROOT, &nid);
 	for (i = 0; i < total_nodes; i++, nid++) {
-		codec->function_id = snd_hda_param_read(codec, nid,
+		function_id = snd_hda_param_read(codec, nid,
 						AC_PAR_FUNCTION_TYPE) & 0xff;
-		switch (codec->function_id) {
+		switch (function_id) {
 		case AC_GRP_AUDIO_FUNCTION:
 			codec->afg = nid;
+			codec->function_id = function_id;
 			break;
 		case AC_GRP_MODEM_FUNCTION:
 			codec->mfg = nid;
+			codec->function_id = function_id;
 			break;
 		default:
 			break;