mtd: mtdram: initialize writebufsize field

Set the 'mtd->writebufsize' field to 64 to mimic modern CFI flashes.

Signed-off-by: Artem Bityutskiy <[e-mail]>
Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/devices/mtdram.c

···
 	mtd->flags = MTD_CAP_RAM;
 	mtd->size = size;
 	mtd->writesize = 1;
+	mtd->writebufsize = 64; /* Mimic CFI NOR flashes */
 	mtd->erasesize = MTDRAM_ERASE_SIZE;
 	mtd->priv = mapped_address;