USB: core/sysfs: fix sparse warnings

Fix 3 sparse warning in drivers/usb/core/sysfs.c.

	warning: symbol '__mptr' shadows an earlier one
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/sysfs.c

@@ -552,8 +552,8 @@ static struct attribute *dev_string_attrs[] = {
 static mode_t dev_string_attrs_are_visible(struct kobject *kobj,
 		struct attribute *a, int n)
 {
-	struct usb_device *udev = to_usb_device(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
 
 	if (a == &dev_attr_manufacturer.attr) {
 		if (udev->manufacturer == NULL)
@@ -585,8 +585,8 @@ static ssize_t
 read_descriptors(struct kobject *kobj, struct bin_attribute *attr,
 		char *buf, loff_t off, size_t count)
 {
-	struct usb_device *udev = to_usb_device(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
 	size_t nleft = count;
 	size_t srclen, n;
 	int cfgno;
@@ -786,8 +786,8 @@ static struct attribute *intf_assoc_attrs[] = {
 static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
 		struct attribute *a, int n)
 {
-	struct usb_interface *intf = to_usb_interface(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_interface *intf = to_usb_interface(dev);
 
 	if (intf->intf_assoc == NULL)
 		return 0;