aoe: cleanup: correct comment for aoetgt nout

A misplaced comment was attached to the nout member of the aoetgt.  This
change corrects the comment.
Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/block/aoe/aoe.h

@@ -133,7 +133,7 @@ struct aoetgt {
 	struct list_head ffree;			/* list of free frames */
 	struct aoeif ifs[NAOEIFS];
 	struct aoeif *ifp;	/* current aoeif in use */
-	ushort nout;		/* value of nout when skb was sent */
+	ushort nout;		/* number of AoE commands outstanding */
 	ushort maxout;		/* current value for max outstanding */
 	ushort next_cwnd;	/* incr maxout after decrementing to zero */
 	ushort ssthresh;	/* slow start threshold */