[][MAC80211][misc][Fix external build fail of MAC80211]

[Description]
Fix build fail of MAC80211 due to BSP reorganized files change.

[Release-log]
N/A

Change-Id: I64236db6fc31bf932171c9be95903c36008ced99
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8551607
1 file changed