mac80211: add back lost debugfs files

Somehow these files were never present or lost, but the code
is there and they seem somewhat useful, so add them back.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

path: root/tools/perf/tests/attr/test-stat-no-inherit

[config]
command = stat
args    = -i -e cycles kill >/dev/null 2>&1
ret     = 1

[event:base-stat]
inherit=0