ice: Shut down VSI with "link-down-on-close" enabled

Disabling netdev with ethtool private flag "link-down-on-close" enabled
can cause NULL pointer dereference bug. Shut down VSI regardless of
"link-down-on-close" state.

Fixes: 8ac71327 ("ice: Fix interface being down after reset with link-down-on-close flag on")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Ngai-Mint Kwan <ngai-mint.kwan@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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

@@ -9193,6 +9193,8 @@ int ice_stop(struct net_device *netdev)
 			else
 				netdev_err(vsi->netdev, "Failed to set physical link down, VSI %d error %d\n",
 					   vsi->vsi_num, link_err);
+
+			ice_vsi_close(vsi);
 			return -EIO;
 		}
 	}