vmstate: create VMSTATE_I2C_SLAVE

Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/hw.h

@@ -440,6 +440,17 @@ extern const VMStateDescription vmstate_pci_device;
             + type_check(PCIDevice,typeof_field(_state, _field))     \
 }
 
+extern const VMStateDescription vmstate_i2c_slave;
+
+#define VMSTATE_I2C_SLAVE(_field, _state) {                          \
+    .name       = (stringify(_field)),                               \
+    .size       = sizeof(i2c_slave),                                 \
+    .vmsd       = &vmstate_i2c_slave,                                \
+    .flags      = VMS_STRUCT,                                        \
+    .offset     = offsetof(_state, _field)                           \
+            + type_check(i2c_slave,typeof_field(_state, _field))     \
+}
+
 /* _f : field name
    _f_n : num of elements field_name
    _n : num of elements

hw/i2c.c

@@ -153,7 +153,7 @@ static int i2c_slave_post_load(void *opaque, int version_id)
     return 0;
 }
 
-static const VMStateDescription vmstate_i2c_slave = {
+const VMStateDescription vmstate_i2c_slave = {
     .name = "i2c_slave",
     .version_id = 1,
     .minimum_version_id = 1,