startup_xen references PV-only code, decorate it with #ifdef CONFIG_XEN_PV
to make PV-free builds possible.
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: NJuergen Gross <jgross@suse.com>
Signed-off-by: NJuergen Gross <jgross@suse.com>