Move FDT_RAMDISK_OVERHEAD from fdt.h to libfdt_env.h

The define should not have been put in fdt.h originally, libfdt_env.h
is the proper place for target-specific customizations.

Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>
diff --git a/include/fdt.h b/include/fdt.h
index 488343c..526aedb 100644
--- a/include/fdt.h
+++ b/include/fdt.h
@@ -108,6 +108,4 @@
 #define FDT_V16_SIZE	FDT_V3_SIZE
 #define FDT_V17_SIZE	(FDT_V16_SIZE + sizeof(fdt32_t))
 
-/* adding a ramdisk needs 0x44 bytes in version 2008.10 */
-#define FDT_RAMDISK_OVERHEAD	0x80
 #endif /* _FDT_H */
diff --git a/include/libfdt_env.h b/include/libfdt_env.h
index 3e3defc..0821258 100644
--- a/include/libfdt_env.h
+++ b/include/libfdt_env.h
@@ -35,4 +35,7 @@
 #define fdt64_to_cpu(x)		be64_to_cpu(x)
 #define cpu_to_fdt64(x)		cpu_to_be64(x)
 
+/* adding a ramdisk needs 0x44 bytes in version 2008.10 */
+#define FDT_RAMDISK_OVERHEAD	0x80
+
 #endif /* _LIBFDT_ENV_H */