ALSA: hda - fix audio on LG R510

Currently, LG R510 is only able to produce sound on headphones, the
internal speakers are not working.

The user tested and confirmed that with model=Dell headphones,
internal speakers and the microphone are working flawlessly.
Tested-by: NSerdar Soytetir <tulliana@gmail.com>
Signed-off-by: NOzan Çağlayan <ozan@pardus.org.tr>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -12111,6 +12111,7 @@ static struct snd_pci_quirk alc268_cfg_tbl[] = {
 						ALC268_ACER_ASPIRE_ONE),
 	SND_PCI_QUIRK(0x1028, 0x0253, "Dell OEM", ALC268_DELL),
 	SND_PCI_QUIRK(0x1028, 0x02b0, "Dell Inspiron Mini9", ALC268_DELL),
+	SND_PCI_QUIRK(0x1854, 0x1775, "LG R510", ALC268_DELL),
 	SND_PCI_QUIRK(0x103c, 0x30cc, "TOSHIBA", ALC268_TOSHIBA),
 	SND_PCI_QUIRK(0x103c, 0x30f1, "HP TX25xx series", ALC268_TOSHIBA),
 	SND_PCI_QUIRK(0x1043, 0x1205, "ASUS W7J", ALC268_3ST),