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

Set its max_speed to be super speed.

Reviewed-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Tested-by: faqiang.zhu <faqiang.zhu@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
index 86fdd16..afb7b74 100644
--- a/drivers/usb/gadget/g_dnl.c
+++ b/drivers/usb/gadget/g_dnl.c
@@ -286,6 +286,7 @@
 	.name = NULL,
 	.dev = &device_desc,
 	.strings = g_dnl_composite_strings,
+	.max_speed = USB_SPEED_SUPER,
 
 	.bind = g_dnl_bind,
 	.unbind = g_dnl_unbind,