[MTD] Allow variable block sizes in mtd_blkdevs

Currently, mtd_blkdevs enforces a block size of 512, even if the drivers
can seemingly request a different size. This patch fixes mtd_blkdevs so
block sizes other than 512 work correctly.

Signed-off-by: Richard Purdie <rpurdie@openedhand.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
index 72fc68c..9a6e2f9 100644
--- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h
@@ -24,7 +24,6 @@
 	struct mtd_info *mtd;
 	struct mutex lock;
 	int devnum;
-	int blksize;
 	unsigned long size;
 	int readonly;
 	void *blkcore_priv; /* gendisk in 2.5, devfs_handle in 2.4 */
@@ -36,6 +35,8 @@
 	char *name;
 	int major;
 	int part_bits;
+	int blksize;
+	int blkshift;
 
 	/* Access functions */
 	int (*readsect)(struct mtd_blktrans_dev *dev,