treewide: include libfdt_env.h before fdt.h

and, if including libfdt.h which includes libfdt_env.h in
the correct order, don't include fdt.h before libfdt.h.

this is needed to get the fdt type definitions set from
the project environment before fdt.h uses them.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Jerry Van Baren <gvb.uboot@gmail.com>

common/fdt_support.c

@@ -28,7 +28,6 @@
 #include <linux/ctype.h>
 #include <linux/types.h>
 #include <asm/global_data.h>
-#include <fdt.h>
 #include <libfdt.h>
 #include <fdt_support.h>
 #include <exports.h>