fcoe: cleanup return codes from fcoe_rcv

the return codes from fcoe_rcv should be NET_RX_*, not 0 or -1.

Signed-off-by: Neil Horman <[e-mail]>
Signed-off-by: Robert Love <[e-mail]>

drivers/scsi/fcoe/fcoe.c

···
 		wake_up_process(fps->thread);
 	spin_unlock(&fps->fcoe_rx_list.lock);
 
-	return 0;
+	return NET_RX_SUCCESS;
 err:
 	per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
 	put_cpu();
 err2:
 	kfree_skb(skb);
-	return -1;
+	return NET_RX_DROP;
 }
 
 /**