ice: use repr instead of vf->repr

Extract repr from vf->repr as it is often use in the ice_repr_rem().

Remove meaningless clearing of q_vector and netdev pointers as kfree is
called on repr pointer.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_repr.c

@@ -355,16 +355,16 @@ static int ice_repr_add(struct ice_vf *vf)
  */
 static void ice_repr_rem(struct ice_vf *vf)
 {
-	if (!vf->repr)
+	struct ice_repr *repr = vf->repr;
+
+	if (!repr)
 		return;
 
-	kfree(vf->repr->q_vector);
-	vf->repr->q_vector = NULL;
-	unregister_netdev(vf->repr->netdev);
+	kfree(repr->q_vector);
+	unregister_netdev(repr->netdev);
 	ice_devlink_destroy_vf_port(vf);
-	free_netdev(vf->repr->netdev);
-	vf->repr->netdev = NULL;
-	kfree(vf->repr);
+	free_netdev(repr->netdev);
+	kfree(repr);
 	vf->repr = NULL;
 
 	ice_virtchnl_set_dflt_ops(vf);