ALSA: hda - don't compare with yourself in fill_input_pin_labels

Just stumbled over this one while reading the code.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -2558,7 +2558,7 @@ static int fill_input_pin_labels(struct hda_codec *codec)
 
 		label = hda_get_autocfg_input_label(codec, cfg, i);
 		idx = 0;
-		for (j = i; j >= 0; j--) {
+		for (j = i - 1; j >= 0; j--) {
 			if (spec->input_labels[j] &&
 			    !strcmp(spec->input_labels[j], label)) {
 				idx = spec->input_label_idxs[j] + 1;