mtd: onenand: 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>
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
index 2edef58..bac41ca 100644
--- a/drivers/mtd/onenand/onenand_base.c
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -4080,6 +4080,7 @@
 	mtd->block_isbad = onenand_block_isbad;
 	mtd->block_markbad = onenand_block_markbad;
 	mtd->owner = THIS_MODULE;
+	mtd->writebufsize = mtd->writesize;
 
 	/* Unlock whole block */
 	this->unlock_all(mtd);