ALSA: hda - Add model string for Intel reference board quirk

For allowing user to apply the existing quirk on a machine with a
different SSID, add a new model string entry, alc700-ref.
The quirk itself was introduced in the commit b84e8436: "ALSA:
hda/realtek - Enable jack detection function for Intel ALC700")
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Documentation/sound/hd-audio/models.rst

@@ -82,6 +82,8 @@ tpt460
     Lenovo Thinkpad T460/560 setup
 dual-codecs
     Lenovo laptops with dual codecs
+alc700-ref
+    Intel reference board with ALC700 codec
 
 ALC66x/67x/892
 ==============

sound/pci/hda/patch_realtek.c

@@ -6357,6 +6357,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = {
 	{.id = ALC292_FIXUP_TPT440, .name = "tpt440"},
 	{.id = ALC292_FIXUP_TPT460, .name = "tpt460"},
 	{.id = ALC233_FIXUP_LENOVO_MULTI_CODECS, .name = "dual-codecs"},
+	{.id = ALC700_FIXUP_INTEL_REFERENCE, .name = "alc700-ref"},
 	{}
 };
 #define ALC225_STANDARD_PINS \