ALSA: hda - VIA: Fix VT1708 can't build up Headphone control issue

Since VT1708 didn't support the control of getting connection number,
building of headphone control will fail in via_hp_build() function.
Signed-off-by: Lydia Wang <lydiawang@viatech.com.cn>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_via.c

@@ -1266,9 +1266,12 @@ static int via_hp_build(struct hda_codec *codec)
 		break;
 	}
 
-	nums = snd_hda_get_connections(codec, nid, conn, HDA_MAX_CONNECTIONS);
+	if (spec->codec_type != VT1708) {
+		nums = snd_hda_get_connections(codec, nid,
+					       conn, HDA_MAX_CONNECTIONS);
 		if (nums <= 1)
 			return 0;
+	}
 
 	knew = via_clone_control(spec, &via_hp_mixer[0]);
 	if (knew == NULL)