ssi: Convert last use of ssi_create_slave_no_init() manually

Same transformation as in the previous commit.  Manual, because
convincing Coccinelle to transform this case is not worthwhile.

Cc: Alistair Francis <alistair@alistair23.me>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200610053247.1583243-25-armbru@redhat.com>

hw/ssi/ssi.c

@@ -16,6 +16,7 @@
 #include "hw/ssi/ssi.h"
 #include "migration/vmstate.h"
 #include "qemu/module.h"
+#include "qapi/error.h"
 
 struct SSIBus {
     BusState parent_obj;
@@ -96,9 +97,9 @@ DeviceState *ssi_create_slave_no_init(SSIBus *bus, const char *name)
 
 DeviceState *ssi_create_slave(SSIBus *bus, const char *name)
 {
-    DeviceState *dev = ssi_create_slave_no_init(bus, name);
+    DeviceState *dev = qdev_new(name);
 
-    qdev_init_nofail(dev);
+    qdev_realize_and_unref(dev, &bus->parent_obj, &error_fatal);
     return dev;
 }