Coding Style cleanup: remove trailing white space

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/env_mmc.c b/common/env_mmc.c
index 204d23b..045428c 100644
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -1,7 +1,7 @@
 /*
  * (C) Copyright 2008-2011 Freescale Semiconductor, Inc.
  *
- * SPDX-License-Identifier:	GPL-2.0+ 
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /* #define DEBUG */