hw/cxl/cxl_pci.h and hw/cxl/cxl_cdat.h include each other. The former
doesn't actually need the latter, so drop that inclusion to break the
loop.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221222100330.380143-8-armbru@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>