liquidio: mark expected switch fall-through in octeon_destroy_resources

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: NFelix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/lio_vf_main.c

@@ -747,7 +747,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 
 		if (lio_wait_for_oq_pkts(oct))
 			dev_err(&oct->pci_dev->dev, "OQ had pending packets\n");
-
+		/* fall through */
 	case OCT_DEV_INTR_SET_DONE:
 		/* Disable interrupts  */
 		oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);