Coding Style cleanup: remove trailing white space

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index 7257f10..f2e750f 100644
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -2,7 +2,7 @@
  * (C) Copyright 2001
  * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
  *
- * SPDX-License-Identifier:	GPL-2.0+ 
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>