mtd: nand: add mtd->writebufsize initialization

Initialize mtd->writebufsize to be equal to mtd->writesize.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/nand_base.c

@@ -3439,6 +3439,7 @@ int nand_scan_tail(struct mtd_info *mtd)
 	mtd->resume = nand_resume;
 	mtd->block_isbad = nand_block_isbad;
 	mtd->block_markbad = nand_block_markbad;
+	mtd->writebufsize = mtd->writesize;
 
 	/* propagate ecc.layout to mtd_info */
 	mtd->ecclayout = chip->ecc.layout;