libfdt_env.h: add fdt type definitions

fdt types are big endian.

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

include/libfdt_env.h

@@ -22,9 +22,14 @@
 #define _LIBFDT_ENV_H
 
 #include "compiler.h"
+#include "linux/types.h"
 
 extern struct fdt_header *working_fdt;  /* Pointer to the working fdt */
 
+typedef __be16 fdt16_t;
+typedef __be32 fdt32_t;
+typedef __be64 fdt64_t;
+
 #define fdt32_to_cpu(x)		be32_to_cpu(x)
 #define cpu_to_fdt32(x)		cpu_to_be32(x)
 #define fdt64_to_cpu(x)		be64_to_cpu(x)