usb: gadget: dnl: set dnl to be super speed

Set its max_speed to be super speed.
Reviewed-by: NYe Li <ye.li@nxp.com>
Reviewed-by: NPeter Chen <peter.chen@nxp.com>
Tested-by: Nfaqiang.zhu <faqiang.zhu@nxp.com>
Signed-off-by: NLi Jun <jun.li@nxp.com>
Signed-off-by: NPeng Fan <peng.fan@nxp.com>

drivers/usb/gadget/g_dnl.c

@@ -286,6 +286,7 @@ static struct usb_composite_driver g_dnl_driver = {
 	.name = NULL,
 	.dev = &device_desc,
 	.strings = g_dnl_composite_strings,
+	.max_speed = USB_SPEED_SUPER,
 
 	.bind = g_dnl_bind,
 	.unbind = g_dnl_unbind,