[][MAC80211][WiFi6][Misc][Add Filogic 820 Build]

[Description]
Add Filogic 820 Build

[Release-log]
N/A

Change-Id: Ic901b49b3f1e0796c277a29df796ed67d510098a
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8246187
4 files changed