memory: Convert to new qapi union layout

We have two issues with our qapi union layout:
1) Even though the QMP wire format spells the tag 'type', the
C code spells it 'kind', requiring some hacks in the generator.
2) The C struct uses an anonymous union, which places all tag
values in the same namespace as all non-variant members. This
leads to spurious collisions if a tag value matches a non-variant
member's name.

Make the conversion to the new layout for memory-related code.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1445898903-12082-21-git-send-email-eblake@redhat.com>
[Commit message tweaked slightly]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/numa.c b/numa.c
index e9b18f5..fdfe294 100644
--- a/numa.c
+++ b/numa.c
@@ -226,9 +226,9 @@
         goto error;
     }
 
-    switch (object->kind) {
+    switch (object->type) {
     case NUMA_OPTIONS_KIND_NODE:
-        numa_node_parse(object->node, opts, &err);
+        numa_node_parse(object->u.node, opts, &err);
         if (err) {
             goto error;
         }
@@ -487,9 +487,9 @@
         MemoryDeviceInfo *value = info->value;
 
         if (value) {
-            switch (value->kind) {
+            switch (value->type) {
             case MEMORY_DEVICE_INFO_KIND_DIMM:
-                node_mem[value->dimm->node] += value->dimm->size;
+                node_mem[value->u.dimm->node] += value->u.dimm->size;
                 break;
             default:
                 break;