[PATCH] powerpc/cell spidernet fix error interrupt print

The print message associated with the descriptor chain end interrupt
prints a bogs value. Fix that.
Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Cc: James K Lewis <jklewis@us.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/spider_net.c

@@ -1356,7 +1356,7 @@ spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg)
 		if (netif_msg_intr(card))
 			pr_err("got descriptor chain end interrupt, "
 			       "restarting DMAC %c.\n",
-			       'D'+i-SPIDER_NET_GDDDCEINT);
+			       'D'-(i-SPIDER_NET_GDDDCEINT)/3);
 		spider_net_refill_rx_chain(card);
 		spider_net_enable_rxdmac(card);
 		show_error = 0;