ALSA: jack: remove exporting ctljack functions

snd_kctl_jack_new() and snd_kctl_jack_report() are internal only now
so make them static.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/ctljack.c b/sound/core/ctljack.c
index 6435e82..8f8d103 100644
--- a/sound/core/ctljack.c
+++ b/sound/core/ctljack.c
@@ -74,7 +74,6 @@
 	kctl->private_value = 0;
 	return kctl;
 }
-EXPORT_SYMBOL_GPL(snd_kctl_jack_new);
 
 void snd_kctl_jack_report(struct snd_card *card,
 			  struct snd_kcontrol *kctl, bool status)
@@ -84,4 +83,3 @@
 	kctl->private_value = status;
 	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
 }
-EXPORT_SYMBOL_GPL(snd_kctl_jack_report);