[][MAC80211][WiFi6][core][Add sta info flush and send deauth during DFS channel switch]

[Description]
Add sta info flush and send deauth during DFS channel switch
Enqueue a sta info flush work to avoid dead lock (chanctx_mtx) between
csa_finalize_work and ieee80211_recalc_min_chandef

[Release-log]
N/A

Change-Id: I93196a0938d6d7733cb6dcaf4d8cd898e397c4a0
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8455027
2 files changed