mtd: rawnand: nandsim: Free the allocated device on error in ns_init()

The nandsim device is allocated and initialized inside ns_init() by a
call to ns_alloc_device(), free it on error.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200525085851.17682-10-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/nandsim.c

@@ -766,12 +766,14 @@ static int __init ns_init(struct mtd_info *mtd)
 		NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n",
 			ns->geom.pgszoob);
 		ret = -ENOMEM;
-		goto free_partition_names;
+		goto free_device;
 	}
 	memset(ns->buf.byte, 0xFF, ns->geom.pgszoob);
 
 	return 0;
 
+free_device:
+	ns_free_device(ns);
 free_partition_names:
 	for (i = 0; i < ARRAY_SIZE(ns->partitions); ++i)
 		kfree(ns->partitions[i].name);