PCI: pci-sysfs: remove casts from void*

Remove unnesessary casts from void*.
Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/pci-sysfs.c

@@ -734,7 +734,7 @@ pci_mmap_resource(struct kobject *kobj, struct bin_attribute *attr,
 {
 	struct pci_dev *pdev = to_pci_dev(container_of(kobj,
 						       struct device, kobj));
-	struct resource *res = (struct resource *)attr->private;
+	struct resource *res = attr->private;
 	enum pci_mmap_state mmap_type;
 	resource_size_t start, end;
 	int i;