iavf: add support to exchange qos capabilities

During driver initialization VF determines QOS capability is allowed
by PF and receives QOS parameters. After which quanta size for queues
is configured which is not configurable and is set to 1KB currently.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Link: https://patch.msgid.link/72cbeb9c88d40e557053c57d7531c96bed490576.1728460186.git.pabeni@redhat.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>