monitor: move include files to include/monitor/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/device-hotplug.c b/hw/device-hotplug.c
index 336ffc2..809a598 100644
--- a/hw/device-hotplug.c
+++ b/hw/device-hotplug.c
@@ -27,7 +27,7 @@
 #include "blockdev.h"
 #include "qemu-config.h"
 #include "sysemu.h"
-#include "monitor.h"
+#include "monitor/monitor.h"
 
 DriveInfo *add_init_drive(const char *optstr)
 {