ALSA: hda - Add quirk for Dell Studio 1555

Added a quirk entry for Dell Studio 1555.

Reference: Novell bnc#525244
	https://bugzilla.novell.com/show_bug.cgi?id=525244

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -1809,6 +1809,8 @@ static struct snd_pci_quirk stac92hd73xx_cfg_tbl[] = {
 				"Dell Studio 1537", STAC_DELL_M6_DMIC),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x02a0,
 				"Dell Studio 17", STAC_DELL_M6_DMIC),
+	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x02be,
+				"Dell Studio 1555", STAC_DELL_M6_DMIC),
 	{} /* terminator */
 };