af_unix: update locking comment

We latch our state using a spinlock not a r/w kind of lock.

Signed-off-by: Daniel Baluta <dbaluta@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/unix/af_unix.c

@@ -1124,7 +1124,7 @@ restart:
 
 	/* Latch our state.
 
-	   It is tricky place. We need to grab write lock and cannot
+	   It is tricky place. We need to grab our state lock and cannot
 	   drop lock on peer. It is dangerous because deadlock is
 	   possible. Connect to self case and simultaneous
 	   attempt to connect are eliminated by checking socket