The category of the nand device is not set, put it into the 'storage' category.

Signed-off-by: Gan Qixin <ganqixin@huawei.com>
---
 hw/block/nand.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/block/nand.c b/hw/block/nand.c
index bcceb64ebb..1d7a48a2ec 100644
--- a/hw/block/nand.c
+++ b/hw/block/nand.c
@@ -449,6 +449,7 @@ static void nand_class_init(ObjectClass *klass, void *data)
     dc->reset = nand_reset;
     dc->vmsd = &vmstate_nand;
     device_class_set_props(dc, nand_properties);
+    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 }
 
 static const TypeInfo nand_info = {
-- 
2.23.0