USB-CDC: change simple_strtol to simple_strtoul

The patch is based on commit bb9496c6f7e853e5d4edd5397c9d45f1968d623c
(done by Julia Lawall <julia@diku.dk>) from linux-2.6.git.

Since num is unsigned, it would seem better to use simple_strtoul that
simple_strtol.
Signed-off-by: NVitaly Kuzmichev <vkuzmichev@mvista.com>

drivers/usb/gadget/epautoconf.c

@@ -156,7 +156,7 @@ ep_matches (
 
 	/* report address */
 	if (isdigit (ep->name [2])) {
-		u8	num = simple_strtol (&ep->name [2], NULL, 10);
+		u8	num = simple_strtoul (&ep->name [2], NULL, 10);
 		desc->bEndpointAddress |= num;
 #ifdef	MANY_ENDPOINTS
 	} else if (desc->bEndpointAddress & USB_DIR_IN) {