[ALSA] hda-codec - Fix ALC882 capture source selection

The capture source selection for ADC list with two elements is buggy
becaues of a wrong capture mux list.  This patch fixes the starting
index based on spec->num_adc_nids.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

sound/pci/hda/patch_realtek.c

@@ -5227,10 +5227,14 @@ static int alc882_mux_enum_put(struct snd_kcontrol *kcontrol,
 	const struct hda_input_mux *imux = spec->input_mux;
 	unsigned int adc_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id);
 	static hda_nid_t capture_mixers[3] = { 0x24, 0x23, 0x22 };
-	hda_nid_t nid = capture_mixers[adc_idx];
+	hda_nid_t nid;
 	unsigned int *cur_val = &spec->cur_mux[adc_idx];
 	unsigned int i, idx;
 
+	if (spec->num_adc_nids < 3)
+		nid = capture_mixers[adc_idx + 1];
+	else
+		nid = capture_mixers[adc_idx];
 	idx = ucontrol->value.enumerated.item[0];
 	if (idx >= imux->num_items)
 		idx = imux->num_items - 1;