net/iavf: workaround RSS cleanup failure handling
net/iavf: workaround RSS cleanup failure handling

Allow to ignore error returned from virtual channel command
 VIRTCHNL_OP_SET_RSS_HENA with hena = 0 due to some legacy
kernel driver does not support this. Add warning message when
this happen.

Signed-off-by: Xuan Ding <31a30f992ded31cfb4c030a8612d2ba3ea85d25e@intel.com>
Acked-by: Qi Zhang <9e9e58ffa71a29bb7b87766b362515be648fcbe0@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk