The hv_pcibus_device structure contains an in-memory hypercall argument
that must not cross a page boundary.  Allocate the structure as a page to
ensure that.
Signed-off-by: NJork Loeser <jloeser@microsoft.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Acked-by: NK. Y. Srinivasan <kys@microsoft.com>