misc: mic: mark expected switch fall-through

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mic/scif/scif_api.c

@@ -187,6 +187,7 @@ int scif_close(scif_epd_t epd)
 	case SCIFEP_ZOMBIE:
 		dev_err(scif_info.mdev.this_device,
 			"SCIFAPI close: zombie state unexpected\n");
+		/* fall through */
 	case SCIFEP_DISCONNECTED:
 		spin_unlock(&ep->lock);
 		scif_unregister_all_windows(epd);