Use ETIMEDOUT instead of ETIME for exceeding max latency

ETIME isn't very portable...

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/io_u.c b/io_u.c
index 551c5ff..119dd65 100644
--- a/io_u.c
+++ b/io_u.c
@@ -1359,8 +1359,8 @@
 		if (td->o.max_latency && tusec > td->o.max_latency) {
 			if (!td->error)
 				log_err("fio: latency of %lu usec exceeds specified max (%u usec)\n", tusec, td->o.max_latency);
-			td_verror(td, ETIME, "max latency exceeded");
-			icd->error = ETIME;
+			td_verror(td, ETIMEDOUT, "max latency exceeded");
+			icd->error = ETIMEDOUT;
 		}
 	}