rockchip: Add Realtek RTL8821CU support for the Radxa ROCK Pi E v3

There is a variant of the Radxa ROCK Pi E v3 equipped with the Realtek
RTL8821CU. Add the kmod-rtw88-8821cu package for it.

Signed-off-by: FUKAUMI Naoki <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18310
Signed-off-by: Stijn Tintel <[email protected]>
(cherry picked from commit f13ddfb0cfb7f71ef542697fffb0978e80257177)
Link: https://github.com/openwrt/openwrt/pull/19940
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/rockchip/image/armv8.mk

@@ -236,7 +236,7 @@ define Device/radxa_rock-pi-e-v3
   DEVICE_MODEL := ROCK Pi E v3.0
   SOC := rk3328
   DEVICE_DTS := rockchip/rk3328-rock-pi-e
-  DEVICE_PACKAGES := kmod-rtw88-8723du kmod-usb-net-cdc-ncm kmod-usb-net-rndis wpad-basic-mbedtls
+  DEVICE_PACKAGES := kmod-rtw88-8723du kmod-rtw88-8821cu kmod-usb-net-cdc-ncm kmod-usb-net-rndis wpad-basic-mbedtls
 endef
 TARGET_DEVICES += radxa_rock-pi-e-v3