softmmu: move include files to include/sysemu/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/xen-all.c b/xen-all.c
index 6965626..b659321 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -17,7 +17,7 @@
 #include "qmp-commands.h"
 
 #include "qemu/range.h"
-#include "xen-mapcache.h"
+#include "sysemu/xen-mapcache.h"
 #include "trace.h"
 #include "exec/address-spaces.h"