Add documentation describing the extensions provided by Version
1 of the Device Feature Header (DFHv1).
Signed-off-by: NMatthew Gerlach <matthew.gerlach@linux.intel.com>
Reviewed-by: NIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: NTom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20230115151447.1353428-2-matthew.gerlach@linux.intel.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>