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>
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index 7cee364..7a97f12 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -361,7 +361,7 @@
 };
 
 /*
- * Helper for automatic ping configuration
+ * Helper for automatic pin configuration
  */
 
 enum {