Remove compile warning when in non-napi mode.
Signed-off-by:  Don Fry <pcnet32@verizon.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
 
 static void pcnet32_netif_stop(struct net_device *dev)
 {
+#ifdef CONFIG_PCNET32_NAPI
        struct pcnet32_private *lp = netdev_priv(dev);
+#endif
        dev->trans_start = jiffies;
 #ifdef CONFIG_PCNET32_NAPI
        napi_disable(&lp->napi);
 
 static void pcnet32_netif_start(struct net_device *dev)
 {
+#ifdef CONFIG_PCNET32_NAPI
        struct pcnet32_private *lp = netdev_priv(dev);
+#endif
        netif_wake_queue(dev);
 #ifdef CONFIG_PCNET32_NAPI
        napi_enable(&lp->napi);