net: tulip: de4x5: fix the problem that the array 'lp->phy[8]' may be out of bound

In line 5001, if all id in the array 'lp->phy[8]' is not 0, when the
'for' end, the 'k' is 8.

At this time, the array 'lp->phy[8]' may be out of bound.
Signed-off-by: zhangyue <zhangyue1@kylinos.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/dec/tulip/de4x5.c

@@ -5000,6 +5000,7 @@ mii_get_phy(struct net_device *dev)
 	}
 	if ((j == limit) && (i < DE4X5_MAX_MII)) {
 	    for (k=0; k < DE4X5_MAX_PHY && lp->phy[k].id; k++);
+	    if (k < DE4X5_MAX_PHY) {
 		lp->phy[k].addr = i;
 		lp->phy[k].id = id;
 		lp->phy[k].spd.reg = GENERIC_REG;      /* ANLPA register         */
@@ -5013,6 +5014,9 @@ mii_get_phy(struct net_device *dev)
 		de4x5_dbg_mii(dev, k);
 		de4x5_debug = j;
 		printk("\n");
+	    } else {
+		goto purgatory;
+	    }
 	}
     }
   purgatory: