ax88796 (address space): cast to unsigned long, not long

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/net/ax88796.c

@@ -819,7 +819,7 @@ static int ax_probe(struct platform_device *pdev)
 	}
 
 	ei_status.mem = ioremap(res->start, size);
-	dev->base_addr = (long)ei_status.mem;
+	dev->base_addr = (unsigned long)ei_status.mem;
 
 	if (ei_status.mem == NULL) {
 		dev_err(&pdev->dev, "Cannot ioremap area (%08zx,%08zx)\n",