ALSA: hda - mark Dell studio 1535 quirk

Fixed the quirk string for Dell studio 1535 (the product name wasn't
published at the time the patch was made).
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -1667,7 +1667,7 @@ static struct snd_pci_quirk stac92hd73xx_cfg_tbl[] = {
 	SND_PCI_QUIRK(PCI_VENDOR_ID_INTEL, 0x2668,
 				"DFI LanParty", STAC_92HD73XX_REF),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0254,
-				"unknown Dell", STAC_DELL_M6),
+				"Dell Studio 1535", STAC_DELL_M6),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0255,
 				"unknown Dell", STAC_DELL_M6),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0256,