fix comment typo in sound/pci/hda/hda_local.h

I think this should be automatic pin instead of ping.
(but could be wrong).
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

sound/pci/hda/hda_local.h

@@ -361,7 +361,7 @@ struct hda_bus_unsolicited {
 };
 
 /*
- * Helper for automatic ping configuration
+ * Helper for automatic pin configuration
  */
 
 enum {