[MTD] Remove the only useless readv implementation

Removing readv from struct mtd_info broke block2mtd. Remove the
reference and the useless default implementation.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

drivers/mtd/devices/block2mtd.c

@@ -331,7 +331,6 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
 	dev->mtd.writev = default_mtd_writev;
 	dev->mtd.sync = block2mtd_sync;
 	dev->mtd.read = block2mtd_read;
-	dev->mtd.readv = default_mtd_readv;
 	dev->mtd.priv = dev;
 	dev->mtd.owner = THIS_MODULE;
 

drivers/mtd/mtdcore.c

@@ -254,37 +254,6 @@ int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
 	return ret;
 }
 
-
-/* default_mtd_readv - default mtd readv method for MTD devices that dont
- *		       implement their own
- */
-
-int default_mtd_readv(struct mtd_info *mtd, struct kvec *vecs,
-		      unsigned long count, loff_t from, size_t *retlen)
-{
-	unsigned long i;
-	size_t totlen = 0, thislen;
-	int ret = 0;
-
-	if(!mtd->read) {
-		ret = -EIO;
-	} else {
-		for (i=0; i<count; i++) {
-			if (!vecs[i].iov_len)
-				continue;
-			ret = mtd->read(mtd, from, vecs[i].iov_len, &thislen, vecs[i].iov_base);
-			totlen += thislen;
-			if (ret || thislen != vecs[i].iov_len)
-				break;
-			from += vecs[i].iov_len;
-		}
-	}
-	if (retlen)
-		*retlen = totlen;
-	return ret;
-}
-
-
 EXPORT_SYMBOL(add_mtd_device);
 EXPORT_SYMBOL(del_mtd_device);
 EXPORT_SYMBOL(get_mtd_device);
@@ -292,7 +261,6 @@ EXPORT_SYMBOL(put_mtd_device);
 EXPORT_SYMBOL(register_mtd_user);
 EXPORT_SYMBOL(unregister_mtd_user);
 EXPORT_SYMBOL(default_mtd_writev);
-EXPORT_SYMBOL(default_mtd_readv);
 
 #ifdef CONFIG_PROC_FS