Fix  using the  bare number to set the 'bDescriptorType' field of the Hub
Descriptor while the value  is #define'd in <linux/usb/ch11.h>.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
                                    struct usb_hub_descriptor *desc)
 {
-       desc->bDescriptorType = 0x29;
+       desc->bDescriptorType = USB_DT_HUB;
        desc->bHubContrCurrent = 0;
        desc->bNbrPorts = r8a66597->max_root_hub;
        desc->bDescLength = 9;