ps3: vuart: fix error path locking

This stray down would cause a permanent sleep which doesn't seem correct.
The other uses of this semaphore appear fairly mutex like it's even
initialized with init_MUTEX() ..  So here a patch for removing this one
down().
Signed-off-by: NGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/ps3/ps3-vuart.c

@@ -1074,7 +1074,6 @@ static int ps3_vuart_probe(struct ps3_system_bus_device *dev)
 	if (result) {
 		dev_dbg(&dev->core, "%s:%d: drv->probe failed\n",
 			__func__, __LINE__);
-		down(&vuart_bus_priv.probe_mutex);
 		goto fail_probe;
 	}