Add plane_num field in MTD_Nand structure.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2334 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/drivers/include/drivers/mtd_nand.h

@@ -35,10 +35,11 @@ struct rt_mtd_nand_device
 {
 	struct rt_device parent;
 
-	rt_uint32_t page_size;			/* The Page size in the flash */
+	rt_uint16_t page_size;			/* The Page size in the flash */
 	rt_uint16_t oob_size;			/* Out of bank size */	
 	rt_uint16_t oob_free;           /* the free area in oob that flash driver not use */
-	
+	rt_uint16_t plane_num; 			/* the number of plane in the NAND Flash */
+
 	rt_uint32_t pages_per_block;    /* The number of page a block */
     rt_uint16_t block_total;