[ALSA] hda-codec - Use model=ref for some Dell laptops

Force to choose model=ref for some Dell laptops with STAC9200 codec
chip for fixing the silent mic recording problem (possibly due to
a BIOS bug).  Reference: ALSA bug#2038
So far, applied to Inspiron 630m, Latitude D620 and 120L.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/pci/hda/patch_sigmatel.c

@@ -582,6 +582,13 @@ static struct hda_board_config stac9205_cfg_tbl[] = {
 	  .pci_subvendor = PCI_VENDOR_ID_INTEL,
 	  .pci_subdevice = 0x2668,	/* DFI LanParty */
 	  .config = STAC_REF },		/* SigmaTel reference board */
+	/* Dell laptops have BIOS problem */
+	{ .pci_subvendor = PCI_VENDOR_ID_DELL, .pci_subdevice = 0x01b5,
+	  .config = STAC_REF },	/* Dell Inspiron 630m */
+	{ .pci_subvendor = PCI_VENDOR_ID_DELL, .pci_subdevice = 0x01c2,
+	  .config = STAC_REF },	/* Dell Latitude D620 */
+	{ .pci_subvendor = PCI_VENDOR_ID_DELL, .pci_subdevice = 0x01cb,
+	  .config = STAC_REF },	/* Dell Latitude 120L */
 	{} /* terminator */
 };