Revert "perf/cgroups: Don't rotate events for cgroups unnecessarily"

This reverts commit 0b4c9255 as it
breaks the abi.

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I3a4cbfa1cfbef15a6aaabf759dc2bbfaa8f2b47a