Revert "SELinux: include definition of new capabilities"

This reverts commit ee8914390fd901fdfb1c02eaaeb4c39b42a9c25a.
Revert "SELinux: Reduce overhead of mls_level_isvalid() function call"

This reverts commit 6f37921c283f64ab210982ac918e8ea36451a673.
Revert "introduce for_each_thread() to replace the buggy while_each_thread() (fix)"

This reverts commit 6b421d6e80cd9f8e53ee9af2f5dd3787dcadd93e.
Revert "lowmemorykiller.c: convert to use for_each_thread"

This reverts commit 56f10fd54f26b6bd2001a2092ac8098d44f78396.
Revert "introduce for_each_thread() to replace the buggy while_each_thread()"

This reverts commit b4f2b475497c2e39c7b450602eff333ef8cdcb78.
Revert "arm: kconfig: disabled CONFIG_HW_PERF_EVENTS"

This reverts commit 44caed95570cd0c247be3b120403de67f58b9133.