When filter configuration is not supported, drivers should return
-EOPNOTSUPP so the core can react correctly.

Fixes: 2f4b411a ("i40e: Enable cloud filters via tc-flower")
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>