Add a definition of the CXL 2.0 region label format. Note this is done
as a separate patch to make the next patch that adds namespace label
support easier to read.
Reported-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://lore.kernel.org/r/163116431893.2460985.4003511000574373922.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: NDan Williams <dan.j.williams@intel.com>