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/scripts/python/bin/failed-syscalls-by-pid-report

#!/bin/bash
# description: system-wide failed syscalls, by pid
# args: [comm]
if [ $# -gt 0 ] ; then
    if ! expr match "$1" "-" > /dev/null ; then
	comm=$1
	shift
    fi
fi
perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/failed-syscalls-by-pid.py $comm