[][MAC80211][wed][Add mt7988 wo firmware]

[Description]
Add mt7988 wo firmware

[Release-log]
N/A


Change-Id: I6ae9aefde629481e168375a7bc10557e896be686
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7391986
3 files changed