snd-hda-intel: better Alienware M17x R3 quirk

I have been told that this way the rear headphone connector is
working as well; with model=alienware only laptop speakers work.
The subsystem of both controller and codec is 1028:0490.
Signed-off-by: NAlbert Pool <albertpool@solcon.nl>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -1608,7 +1608,7 @@ static const struct snd_pci_quirk stac92hd73xx_codec_id_cfg_tbl[] = {
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x043a,
 		      "Alienware M17x", STAC_ALIENWARE_M17X),
 	SND_PCI_QUIRK(PCI_VENDOR_ID_DELL, 0x0490,
-		      "Alienware M17x", STAC_ALIENWARE_M17X),
+		      "Alienware M17x R3", STAC_DELL_EQ),
 	{} /* terminator */
 };