Remove trailing spaces at the end of lines.

wireless/bluetooth/bt_conn.h

@@ -388,7 +388,7 @@ FAR struct bt_conn_s *bt_conn_create_le(FAR const bt_addr_le_t *peer);
  * Input Parameters:
  *   conn       - The connection to send the command on.
  *   rand, ediv - Values to use for the encryption key
- *   ltk        - 
+ *   ltk        -
  *
  * Returned Value:
  *   Zero is returned on success; a negated errno value is returned on any

wireless/bluetooth/bt_smp.h

@@ -10,21 +10,21 @@
  *
  *   Copyright (c) 2016, Intel Corporation
  *   All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
- * 
+ *
  * 1. Redistributions of source code must retain the above copyright notice,
  *    this list of conditions and the following disclaimer.
- * 
+ *
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
- * 
+ *
  * 3. Neither the name of the copyright holder nor the names of its
  *    contributors may be used to endorse or promote products derived from this
  *    software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE