move libc related stuff out of platform.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/hdparm.c

@@ -11,8 +11,9 @@
  * hdparm.c - Command line interface to get/set hard disk parameters
  *          - by Mark Lord (C) 1994-2002 -- freely distributable
  */
-#include "libbb.h"
 #include <linux/hdreg.h>
+#include <sys/mount.h>
+#include "libbb.h"
 
 /* device types */
 /* ------------ */