spice: move client_migrate_info command to ui/

It has nothing to do with migration, except for the "migrate" in the
name of the command.  Move it with the rest of the ui commands.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

ui/ui-qmp-cmds.c

@@ -175,3 +175,32 @@ void qmp_display_update(DisplayUpdateOptions *arg, Error **errp)
         abort();
     }
 }
+
+void qmp_client_migrate_info(const char *protocol, const char *hostname,
+                             bool has_port, int64_t port,
+                             bool has_tls_port, int64_t tls_port,
+                             const char *cert_subject,
+                             Error **errp)
+{
+    if (strcmp(protocol, "spice") == 0) {
+        if (!qemu_using_spice(errp)) {
+            return;
+        }
+
+        if (!has_port && !has_tls_port) {
+            error_setg(errp, QERR_MISSING_PARAMETER, "port/tls-port");
+            return;
+        }
+
+        if (qemu_spice.migrate_info(hostname,
+                                    has_port ? port : -1,
+                                    has_tls_port ? tls_port : -1,
+                                    cert_subject)) {
+            error_setg(errp, "Could not set up display for migration");
+            return;
+        }
+        return;
+    }
+
+    error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol", "'spice'");
+}