[MTD] bugfix: DataFlash is not bit writable

This patch fixes the
"jffs2_flash_writev(): Non-contiguous write to 00825300 with mtd_dataflash" bug.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Artem Bityutskiy <dedekind@infradead.org>
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index 5db7160..10a4f4e 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -480,7 +480,7 @@
 	device->writesize = pagesize;
 	device->owner = THIS_MODULE;
 	device->type = MTD_DATAFLASH;
-	device->flags = MTD_CAP_NORFLASH;
+	device->flags = MTD_WRITEABLE;
 	device->erase = dataflash_erase;
 	device->read = dataflash_read;
 	device->write = dataflash_write;