qapi: Restrict device memory commands to machine code

Only qemu-system-FOO and qemu-storage-daemon provide QMP
monitors, therefore such declarations and definitions are
irrelevant for user-mode emulation.

Restricting the memory commands to machine.json pulls less
QAPI-generated code into user-mode.

Acked-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200913195348.1064154-7-philmd@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
diff --git a/hw/acpi/memory_hotplug.c b/hw/acpi/memory_hotplug.c
index 8d2e822..dfe57af 100644
--- a/hw/acpi/memory_hotplug.c
+++ b/hw/acpi/memory_hotplug.c
@@ -7,6 +7,7 @@
 #include "migration/vmstate.h"
 #include "trace.h"
 #include "qapi/error.h"
+#include "qapi/qapi-events-machine.h"
 #include "qapi/qapi-events-misc.h"
 
 #define MEMORY_SLOTS_NUMBER          "MDNR"