[PATCH] sound: fix kernel-doc build warning

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix kernel-doc build error. A symbol that ends with an underscore
character ('_') has special meaning in reST (reStructuredText), so add
a '*' to prevent this error and to indicate that there are several of
these values to choose from.

../sound/core/jack.c:312: ERROR: Unknown target name: "snd_jack_btn".

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc:	Jaroslav Kysela <perex@xxxxxxxx>
Cc:	Takashi Iwai <tiwai@xxxxxxxx>
Cc:	alsa-devel@xxxxxxxxxxxxxxxx
---
 sound/core/jack.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- lnx-414-rc7.orig/sound/core/jack.c
+++ lnx-414-rc7/sound/core/jack.c
@@ -310,7 +310,7 @@ EXPORT_SYMBOL(snd_jack_set_parent);
  * @type:    Jack report type for this key
  * @keytype: Input layer key type to be reported
  *
- * Map a SND_JACK_BTN_ button type to an input layer key, allowing
+ * Map a SND_JACK_BTN_* button type to an input layer key, allowing
  * reporting of keys on accessories via the jack abstraction.  If no
  * mapping is provided but keys are enabled in the jack type then
  * BTN_n numeric buttons will be reported.