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>

include/jffs2/load_kernel.h

@@ -78,5 +78,6 @@ struct mtdids {
 extern int mtdparts_init(void);
 extern int find_dev_and_part(const char *id, struct mtd_device **dev,
 				u8 *part_num, struct part_info **part);
+extern struct mtd_device *device_find(u8 type, u8 num);
 
 #endif /* load_kernel_h */