Description: perf/hwbp: Simplify the perf-hwbp code, fix documentation
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=1568477
 http://www.openwall.com/lists/oss-security/2018/05/01/3
Notes:
Bugs:
upstream: released (4.16) [f67b15037a7a50c57f72e69a6d59941ad90a0f0f]
4.9-upstream-stable: released (4.9.93) [7614f7db9bee160c5e8d298919af3f28941fc703]
3.16-upstream-stable: released (3.16.57) [6aa1edde1030eb98f6c810709ce4c9d257ecbe5c]
3.2-upstream-stable: released (3.2.102) [0a484bd5d67e0fc458945eeece251be35756a815, 03e58a520044e3ea80a3ea43586f956e2e86c74d]
sid: released (4.15.17-1)
4.9-stretch-security: released (4.9.88-1) bugfix/all/perf-hwbp-Simplify-the-perf-hwbp-code-fix-documentat.patch]
3.16-jessie-security: released (3.16.56-1) [bugfix/all/perf-hwbp-simplify-the-perf-hwbp-code-fix-documentat.patch]
3.2-wheezy-security: released (3.2.101-1) [bugfix/all/perf-hwbp-simplify-the-perf-hwbp-code-fix-documentat.patch]