[][mac80211][mt76][Fix backports6.1 build fail]

[Description]
Fix backports6.1 build fail
- Remove redundant ieee80211_tx_status_ext in patch#0005.
- Use backports 6.1 structures in patch#3009.
- Use backports 5.15 structures in patch#9999.

[Release-log]

Change-Id: I08b94d56c8d3e9aea068b5feea84c56fe627a454
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7444189
3 files changed