Add a new per-cpu node to control isolation of CPU. Usage: echo 1 > isolate - Isolate the core echo 0 > isolate - Unisolate the core Change-Id: I6a13e8dda99130ca794e5b6f51600f4c57a3e921 Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>