Now that i40e_vsi_config_tc() has the pf and hw variable defined, use
them, instead of dereferencing vsi->back. Much easier to read.
Signed-off-by: NMitch Williams <mitch.a.williams@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>