Minor code clean up.

Declare the variable fdt properly as extern.
Call the "set_fn" function pointer the "short way" without the full
  dereferencing syntax.

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

common/fdt_support.c

@@ -37,6 +37,11 @@
  */
 DECLARE_GLOBAL_DATA_PTR;
 
+/*
+ * fdt points to our working device tree.
+ */
+struct fdt_header *fdt;
+
 
 /********************************************************************/
 

include/libfdt_env.h

@@ -26,7 +26,7 @@
 #include <asm/byteorder.h>
 #include <linux/string.h>
 
-struct fdt_header *fdt;         /* Pointer to the working fdt */
+extern struct fdt_header *fdt;  /* Pointer to the working fdt */
 
 #define fdt32_to_cpu(x)		__be32_to_cpu(x)
 #define cpu_to_fdt32(x)		__cpu_to_be32(x)