mtd: nand: ecc-bch: Populate the public nsteps field

Advertize the actual number of steps that will actually be used by the
driver by populating the public field.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Adam Ford <aford173@gmail.com> #logicpd Torpedo
Link: https://lore.kernel.org/linux-mtd/20210127203020.9574-3-miquel.raynal@bootlin.com

drivers/mtd/nand/ecc-sw-bch.c

@@ -245,6 +245,7 @@ int nand_ecc_sw_bch_init_ctx(struct nand_device *nand)
 	}
 
 	nand->ecc.ctx.priv = engine_conf;
+	nand->ecc.ctx.nsteps = nsteps;
 	nand->ecc.ctx.total = nsteps * code_size;
 
 	ret = nand_ecc_sw_bch_init(nand);