sched: add tracing support for bias to waker and prev cpu

Update task_util trace event to trace biased to waker and prev cpu.

Change-Id: I12bb1a6b93eb8dd15f0ecc5f14904b2fd4655fda
Signed-off-by: Lingutla Chandrasekhar <clingutla@codeaurora.org>
2 files changed