3c515: fix using pnp_get_resource when CONFIG_ISAPNP=n

3c515.c uses pnp_irq(), which calls pnp_get_resource(),
which is not defined when CONFIG_PNP=n, so in that case,
get the IRQ from a hardware register.

3c515.c:(.text+0x3adc0): undefined reference to `pnp_get_resource'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/net/3c515.c

@@ -572,12 +572,16 @@ static int corkscrew_setup(struct net_device *dev, int ioaddr,
 	int irq;
 	DECLARE_MAC_BUF(mac);
 
+#ifdef __ISAPNP__
 	if (idev) {
 		irq = pnp_irq(idev, 0);
 		vp->dev = &idev->dev;
 	} else {
 		irq = inw(ioaddr + 0x2002) & 15;
 	}
+#else
+	irq = inw(ioaddr + 0x2002) & 15;
+#endif
 
 	dev->base_addr = ioaddr;
 	dev->irq = irq;