In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Addresses-Coverity-ID: 
1384501 ("Missing break in switch")
Addresses-Coverity-ID: 
1398869 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
        default:
                bpf_warn_invalid_xdp_action(act);
+               /* Fall through */
        case XDP_ABORTED:
                trace_xdp_exception(edev->ndev, prog, act);
+               /* Fall through */
        case XDP_DROP:
                qede_recycle_rx_bd_ring(rxq, cqe->bd_num);
        }