[SCSI] fcoe: kfree() -> kfree_skb()

sk_buff pointers should use kfree_skb() instead of vanilla kfree().

Found by smatch (http://repo.or.cz/w/smatch.git).
Signed-off-by: NDan Carpenter <error27@gmail.com>
Signed-off-by: NRobert Love <robert.w.love@intel.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/fcoe/fcoe.c

@@ -1011,7 +1011,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	wlen = skb->len / FCOE_WORD_TO_BYTE;
 
 	if (!lp->link_up) {
-		kfree(skb);
+		kfree_skb(skb);
 		return 0;
 	}