mtd: nand: jz4740: kill the ->ecc_layout field

->ecc_layout is not used by any board file. Kill this field to avoid any
confusion. New boards are encouraged to use the default ECC layout defined
in NAND core.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

arch/mips/include/asm/mach-jz4740/jz4740_nand.h

@@ -25,8 +25,6 @@ struct jz_nand_platform_data {
 	int			num_partitions;
 	struct mtd_partition	*partitions;
 
-	struct nand_ecclayout	*ecc_layout;
-
 	unsigned char banks[JZ_NAND_NUM_BANKS];
 
 	void (*ident_callback)(struct platform_device *, struct nand_chip *,

drivers/mtd/nand/jz4740_nand.c

@@ -427,9 +427,6 @@ static int jz_nand_probe(struct platform_device *pdev)
 	chip->ecc.strength	= 4;
 	chip->ecc.options	= NAND_ECC_GENERIC_ERASED_CHECK;
 
-	if (pdata)
-		chip->ecc.layout = pdata->ecc_layout;
-
 	chip->chip_delay = 50;
 	chip->cmd_ctrl = jz_nand_cmd_ctrl;
 	chip->select_chip = jz_nand_select_chip;