mtd cs553x_nand: use kzalloc() instead of memset

It's cleaner to use kzalloc() instead of zeroing out in a separate call
to memset().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

Author: Dan Carpenter

drivers/mtd/nand/cs553x_nand.c

@@ -197,7 +197,7 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 	}
 
 	/* Allocate memory for MTD device structure and private data */
-	new_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
+	new_mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
 	if (!new_mtd) {
 		printk(KERN_WARNING "Unable to allocate CS553X NAND MTD device structure.\n");
 		err = -ENOMEM;
@@ -207,10 +207,6 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
 	/* Get pointer to private data */
 	this = (struct nand_chip *)(&new_mtd[1]);
 
-	/* Initialize structures */
-	memset(new_mtd, 0, sizeof(struct mtd_info));
-	memset(this, 0, sizeof(struct nand_chip));
-
 	/* Link the private data with the MTD structure */
 	new_mtd->priv = this;
 	new_mtd->owner = THIS_MODULE;