The max111x is a proper qdev device; we can use dc->vmsd rather than
directly calling vmstate_register().

It's possible that this is a migration compat break, but the only
boards that use this device are the spitz-family ('akita', 'borzoi',
'spitz', 'terrier').

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20200628142429.17111-8-peter.maydell@linaro.org
---
 hw/misc/max111x.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hw/misc/max111x.c b/hw/misc/max111x.c
index d0e5534e4f5..abddfa3c660 100644
--- a/hw/misc/max111x.c
+++ b/hw/misc/max111x.c
@@ -140,8 +140,6 @@ static int max111x_init(SSISlave *d, int inputs)
 
     s->inputs = inputs;
 
-    vmstate_register(VMSTATE_IF(dev), VMSTATE_INSTANCE_ID_ANY,
-                     &vmstate_max111x, s);
     return 0;
 }
 
@@ -206,6 +204,7 @@ static void max111x_class_init(ObjectClass *klass, void *data)
 
     k->transfer = max111x_transfer;
     dc->reset = max111x_reset;
+    dc->vmsd = &vmstate_max111x;
 }
 
 static const TypeInfo max111x_info = {
-- 
2.20.1