samples: configfs: don't use spaces before tabs

The copyright notice alarms checkpatch.pl of usin spaces before tabs.
Fix this.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

samples/configfs/configfs_sample.c

@@ -7,7 +7,7 @@
  *      macros defined by configfs.h
  *
  * Based on sysfs:
- * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
+ *      sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
  * configfs Copyright (C) 2005 Oracle.  All rights reserved.
  */