staging: vc04_services: vchiq_core: 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 <garsilva@embeddedor.com>
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c

@@ -2951,8 +2951,7 @@ vchiq_close_service_internal(VCHIQ_SERVICE_T *service, int close_recvd)
 
 	case VCHIQ_SRVSTATE_OPENSYNC:
 		mutex_lock(&state->sync_mutex);
-		/* Drop through */
-
+		/* fall through */
 	case VCHIQ_SRVSTATE_OPEN:
 		if (state->is_master || close_recvd) {
 			if (!do_abort_bulks(service))