smsc911x: fix platform resource call during module unload

This patch fixes a typo, the platform_get_resource calls in
smsc911x_drv_remove are supposed to look the same as those in
smsc911x_drv_probe.

Reported and fixed by dfoley@telus.net.
Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/smsc911x.c

@@ -1874,7 +1874,7 @@ static int __devexit smsc911x_drv_remove(struct platform_device *pdev)
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 					   "smsc911x-memory");
 	if (!res)
-		platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
 	release_mem_region(res->start, res->end - res->start);