ALSA: hda - Fix multi-io pin assignment in create_multi_out_ctls()

The multi-io pins are calculated with a blind assumption of
cfg->line_outs = 1.  This isn't always true.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index f9d3ea3..93db021 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -1368,7 +1368,7 @@
 		if (!dac)
 			continue;
 		if (i >= cfg->line_outs) {
-			pin = spec->multi_io[i - 1].pin;
+			pin = spec->multi_io[i - cfg->line_outs].pin;
 			index = 0;
 			name = channel_name[i];
 		} else {