[][MAC80211][core][refine backports 5.15 patches]

[Description]
Refactor backports 5.15 patches and apply new naming rule.

[Release-log]
N/A

Change-Id: I7c87a3c29080a4f1aff41b5d064588bf63523389
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7146505
17 files changed