Add support for 2 virtchnl msgs:
VIRTCHNL_OP_SET_RSS_HENA
VIRTCHNL_OP_GET_RSS_HENA_CAPS

The first one allows VFs to clear all previously programmed
RSS configuration and customize it. The second one returns
the RSS HENA bits allowed by the hardware.

Introduce ice_err_to_virt_err which converts kernel
specific errors to virtchnl errors.
Signed-off-by: NMd Fahad Iqbal Polash <md.fahad.iqbal.polash@intel.com>
Signed-off-by: NWojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: NMichal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>