ALSA: hda - Add pin quirk for Dell XPS 15

Two bug reporters with Dell XPS 15 report that they need to use the
dell-headset-multi model to get the headset mic working.

The two bug reporters have different PCI SSID (1028:05fd and 1028:05fe)
but this pin quirk matches both.

BugLink: https://bugs.launchpad.net/bugs/1331915
Signed-off-by: David Henningsson <[e-mail]>
Signed-off-by: Takashi Iwai <[e-mail]>

sound/pci/hda/patch_realtek.c

···
 		},
 		.value = ALC668_FIXUP_AUTO_MUTE,
 	},
+	{
+		.codec = 0x10ec0668,
+		.subvendor = 0x1028,
+#ifdef CONFIG_SND_DEBUG_VERBOSE
+		.name = "Dell XPS 15",
+#endif
+		.pins = (const struct hda_pintbl[]) {
+			{0x12, 0x90a60130},
+			{0x14, 0x90170110},
+			{0x15, 0x0321101f},
+			{0x16, 0x40000000},
+			{0x18, 0x411111f0},
+			{0x19, 0x411111f0},
+			{0x1a, 0x411111f0},
+			{0x1b, 0x411111f0},
+			{0x1d, 0x40d6832d},
+			{0x1e, 0x411111f0},
+			{0x1f, 0x411111f0},
+		},
+		.value = ALC668_FIXUP_AUTO_MUTE,
+	},
 	{}
 };