mtd: denali: Add multi connected NAND support

Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/nand/denali.h b/drivers/mtd/nand/denali.h
index bdf5c2a..b680474 100644
--- a/drivers/mtd/nand/denali.h
+++ b/drivers/mtd/nand/denali.h
@@ -764,6 +764,7 @@
 	int irq_debug_array[32];
 	int idx;
 
+	uint32_t devnum;	/* represent how many nands connected */
 	uint32_t fwblks; /* represent how many blocks FW used */
 	uint32_t totalblks;
 	uint32_t blksperchip;