misc: move include files to include/qemu/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/xen-mapcache.c b/xen-mapcache.c
index 31c06dc..8f4648c 100644
--- a/xen-mapcache.c
+++ b/xen-mapcache.c
@@ -14,7 +14,7 @@
 
 #include "hw/xen_backend.h"
 #include "blockdev.h"
-#include "bitmap.h"
+#include "qemu/bitmap.h"
 
 #include <xen/hvm/params.h>
 #include <sys/mman.h>