fdt_support: delete unnecessary DECLARE_GLOBAL_DATA_PTR

gd->bd is not used in fdt_support.c.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>

common/fdt_support.c

@@ -16,11 +16,6 @@
 #include <fdt_support.h>
 #include <exports.h>
 
-/*
- * Global data (for the gd->bd)
- */
-DECLARE_GLOBAL_DATA_PTR;
-
 /*
  * Get cells len in bytes
  *     if #NNNN-cells property is 2 then len is 8