Coding Style cleanup: remove trailing white space

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/doc/README.autoboot b/doc/README.autoboot
index e4fabc9..ff58a79 100644
--- a/doc/README.autoboot
+++ b/doc/README.autoboot
@@ -2,7 +2,7 @@
  * (C) Copyright 2001
  * Dave Ellis, SIXNET, dge@sixnetio.com
  *
- * SPDX-License-Identifier:	GPL-2.0+ 
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 Using autoboot configuration options