ohci-hub: use USB_DT_HUB

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 <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/host/ohci-hub.c

···
 	u32		rh = roothub_a (ohci);
 	u16		temp;
 
-	desc->bDescriptorType = 0x29;
+	desc->bDescriptorType = USB_DT_HUB;
 	desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24;
 	desc->bHubContrCurrent = 0;