Revert "Fix permissions for sysctl"

This reverts commit 002635a377b7d984ffaa56c61d92886b4d1e1455.
Revert "Add Tiny-RCU"

This reverts commit 3fc3e30d491676514a997b087e8dcbd44f3c3858.
Revert "Fix ARM find-bit"

This reverts commit 61f98363e76d139c6df8c00eee9428158dad4a19.
Tune CPU governor and update kernel config