*: whitespace fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/platform.h b/include/platform.h
index 6563276..855cb28 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -4,7 +4,7 @@
  *
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
-#ifndef	BB_PLATFORM_H
+#ifndef BB_PLATFORM_H
 #define BB_PLATFORM_H 1
 
 /* Assume all these functions exist by default.  Platforms where it is not