ALSA: hda - Add a flag to suppress mic auto-switch

Add a new flag spec->suppress_mic_auto_switch for codecs that don't
support unsol events properly like VT1708.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_generic.h b/sound/pci/hda/hda_generic.h
index 343195c..1763e33 100644
--- a/sound/pci/hda/hda_generic.h
+++ b/sound/pci/hda/hda_generic.h
@@ -175,6 +175,7 @@
 	unsigned int automute_speaker_possible:1; /* there are speakers and either LO or HP */
 	unsigned int automute_lo_possible:1;	  /* there are line outs and HP */
 	unsigned int keep_vref_in_automute:1; /* Don't clear VREF in automute */
+	unsigned int suppress_auto_mic:1; /* suppress input jack auto switch */
 	unsigned int line_in_auto_switch:1; /* allow line-in auto switch */
 
 	/* other flags */