[][MAC80211][wed][Fix mtk_wed_add_hw call trace]

[Description]
Fix mtk_wed_add_hw call trace
If mtk_wed_add_hw() has been called, mtk_wed_exit() needs be called
in error path in mtk_probe.

[Release-log]

Change-Id: Ib40629e13f94a649126863145fb49fcfc25e2873
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9068686
1 file changed