spidernet: increase auto-negotiation timeout to 5 seconds

This patch extends the timeout for spidernet auto-negotiation.
Auto-negotiation often fails to finish in 2 seconds.
Signed-off-by: NKou Ishizaki <kou.ishizaki@toshiba.co.jp>
Acked-by: NJens Osterkamp <jens@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/net/spider_net.h

@@ -52,7 +52,7 @@ extern char spider_net_driver_name[];
 
 #define SPIDER_NET_TX_TIMER			(HZ/5)
 #define SPIDER_NET_ANEG_TIMER			(HZ)
-#define SPIDER_NET_ANEG_TIMEOUT			2
+#define SPIDER_NET_ANEG_TIMEOUT			5
 
 #define SPIDER_NET_RX_CSUM_DEFAULT		1