system/physmem: Do not include 'hw/xen/xen.h' but 'sysemu/xen.h'

physmem.c doesn't use any declaration from "hw/xen/xen.h",
it only requires "sysemu/xen.h" and "system/xen-mapcache.h".

Suggested-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20231114143816.71079-5-philmd@linaro.org>
1 file changed