staging: ozwpan: Add module parameter description

Signed-off-by: Christoph Jaeger <email@christophjaeger.info>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ozwpan/ozmain.c

@@ -25,6 +25,9 @@ unsigned int oz_dbg_mask = OZ_DEFAULT_DBG_MASK;
  * netcards. Bindings can be added later using an IOCTL.
  */
 static char *g_net_dev = "";
+module_param(g_net_dev, charp, S_IRUGO);
+MODULE_PARM_DESC(g_net_dev, "The device(s) to bind to; "
+	"'*' means all, '' (empty string; default) means none.");
 
 /*
  * Context: process
@@ -48,7 +51,6 @@ static void __exit ozwpan_exit(void)
 	oz_cdev_deregister();
 }
 
-module_param(g_net_dev, charp, S_IRUGO);
 module_init(ozwpan_init);
 module_exit(ozwpan_exit);