fdt_support: add partitions fixup in mtd node

Allow overwriting defined partitions in the device tree blob
using partition info defined in the 'mtdparts' environment
variable.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Gerald Van Baren <vanbaren@cideas.com>
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 0a9dd0d..a3d5f8c 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -81,5 +81,7 @@
 
 int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size);
 
+void fdt_fixup_mtdparts(void *fdt, void *node_info, int node_info_size);
+
 #endif /* ifdef CONFIG_OF_LIBFDT */
 #endif /* ifndef __FDT_SUPPORT_H */