ALSA: hda - initialize channel counts correctly

Even a single DAC can output two channels, so the channel count
is twice the number of DACs.
Signed-off-by: NDavid Henningsson <david.henningsson@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_generic.c

@@ -1400,7 +1400,7 @@ static int fill_and_eval_dacs(struct hda_codec *codec,
 	}
 
 	spec->ext_channel_count = spec->min_channel_count =
-		spec->multiout.num_dacs;
+		spec->multiout.num_dacs * 2;
 
 	if (spec->multi_ios == 2) {
 		for (i = 0; i < 2; i++)