[][update netsys reset condition for ax7800 and ax8400]

Add netsys reset flow for ax7800 and ax8400
-- ax7800 and ax8400 need reset two wifi chip
 - wifi notify eth when wifi chip online/offline
 - eth record wifi number by detect online/offline
 - eth need wait all wifi reset done before hw reset
-- remove pse free empty detction
  - free empty trigger by chip when pse buffer less than drop threshold
  - pse is active when trigger free emptry
  - too much logs of free empty event may affect wifi packet handle


Change-Id: I8fa47be45a3d2783cc7217e0130b10bce03d77a7
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6016967
3 files changed