ALSA: hda - Add a warning for ignored pins with ALC259/268/269

The current ALC259/268/269 parser ignores some pins as unhandled,
but user won't notice what goes wrong.  So, added a warning message
for the ignored pins as a hint.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -13164,6 +13164,8 @@ static int alc268_new_analog_output(struct alc_spec *spec, hda_nid_t nid,
 		dac = 0x03;
 		break;
 	default:
+		snd_printd(KERN_WARNING "hda_codec: "
+			   "ignoring pin 0x%x as unknown\n", nid);
 		return 0;
 	}
 	if (spec->multiout.dac_nids[0] != dac &&