ALSA: Add more jack button slots

Some devices have more flexible microphone detection and can detect
a wider range of buttons.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/include/sound/jack.h b/include/sound/jack.h
index d90b9fa..c140fc7 100644
--- a/include/sound/jack.h
+++ b/include/sound/jack.h
@@ -47,6 +47,9 @@
 	SND_JACK_BTN_0		= 0x4000,
 	SND_JACK_BTN_1		= 0x2000,
 	SND_JACK_BTN_2		= 0x1000,
+	SND_JACK_BTN_3		= 0x0800,
+	SND_JACK_BTN_4		= 0x0400,
+	SND_JACK_BTN_5		= 0x0200,
 };
 
 struct snd_jack {
@@ -55,7 +58,7 @@
 	int type;
 	const char *id;
 	char name[100];
-	unsigned int key[3];   /* Keep in sync with definitions above */
+	unsigned int key[6];   /* Keep in sync with definitions above */
 	void *private_data;
 	void (*private_free)(struct snd_jack *);
 };