Coding Style cleanup: remove trailing white space

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/adder/adder.c b/board/adder/adder.c
index fa1a54b..2ee7096 100644
--- a/board/adder/adder.c
+++ b/board/adder/adder.c
@@ -5,7 +5,7 @@
  * Support for Analogue&Micro Adder boards family.
  * Tested on AdderII and Adder87x.
  *
- * SPDX-License-Identifier:	GPL-2.0+ 
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>