libfdt: Move the working_fdt pointer to cmd_fdt.c

The working_fdt pointer was declared in common/fdt_support.c but was
not used there.  Move it to common/cmd_fdt.c where it is used (it is
also used in lib_ppc/bootm.c).

Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>

common/cmd_fdt.c

@@ -46,6 +46,11 @@ static int fdt_parse_prop(char **newval, int count, char *data, int *len);
 static int fdt_print(const char *pathp, char *prop, int depth);
 
 /*
+ * The working_fdt points to our working flattened device tree.
+ */
+struct fdt_header *working_fdt;
+
+/*
  * Flattened Device Tree command, see the help for parameter definitions.
  */
 int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])

common/fdt_support.c

@@ -35,11 +35,6 @@
  */
 DECLARE_GLOBAL_DATA_PTR;
 
-/*
- * fdt points to our working device tree.
- */
-struct fdt_header *working_fdt;
-
 
 /**
  * fdt_find_and_setprop: Find a node and set it's property