ALSA: hda - Add suppress_auto_mute flag to hda_gen_spec

A new flag to skip the auto-mute handling in the generic parser, just
like suppress_auto_mic flag.  It has to be set before calling
snd_hda_gen_parse_auto_config().

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 186a554..1ea9c2d 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -119,6 +119,9 @@
 	if (val >= 0)
 		codec->single_adc_amp = !!val;
 
+	val = snd_hda_get_bool_hint(codec, "auto_mute");
+	if (val >= 0)
+		spec->suppress_auto_mute = !val;
 	val = snd_hda_get_bool_hint(codec, "auto_mic");
 	if (val >= 0)
 		spec->suppress_auto_mic = !val;
@@ -3253,6 +3256,9 @@
 	int present = 0;
 	int i, err;
 
+	if (spec->suppress_auto_mute)
+		return 0;
+
 	if (cfg->hp_pins[0])
 		present++;
 	if (cfg->line_out_pins[0])