Driver rtl8xxxu not recognise comcast CF-811AC

I connect a comcast usb wifi, model is CF-811AC, which chip was rtl8811cu, then I install rtl8xxxu wifi driver, but openwrt cannot recognise wifi device

root@OpenWrt:~# lsusb | grep Realtek
Bus 007 Device 002: ID 0bda:c811 Realtek 802.11ac NIC

root@OpenWrt:~# lsmod | grep rtl
cfg80211              319488  2 rtl8xxxu,mac80211
compat                 16384  3 rtl8xxxu,mac80211,cfg80211,[permanent]
mac80211              565248  1 rtl8xxxu
rtl8xxxu              102400  0

root@OpenWrt:~# iw dev
root@OpenWrt:~#