ALSA: x86: Implement jack control

This patch implements a jack interface for notifying HDMI/DP
connection.  PA listens to this, so it can handle the monitor
connection more gracefully.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/x86/intel_hdmi_audio.h

@@ -130,6 +130,7 @@ struct snd_intelhad {
 	struct work_struct hdmi_audio_wq;
 	struct mutex mutex; /* for protecting chmap and eld */
 	bool need_reset;
+	struct snd_jack *jack;
 };
 
 #endif /* _INTEL_HDMI_AUDIO_ */