sched: Sync EAS codebase to android-4.9

The EAS scheduler (task placement and energy awareness wrapper functions)
changes coming from android common kernel are discarded while merging
into msm-4.9 kernel. This is done to avoid any power/performance/stability
regressions. There is a requirement now to upgrade to a newer EAS version.
As a first step, sync EAS codebase to android common kernel's branch
android-4.9 as of commit b30d2b5d ("Merge 4.9.80 into android-4.9").

Change-Id: I252b39b593002669c1297a39e0415aec140ac961
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>