sched/fair: Add snapshot of placement changes

This snapshot is taken from msm-4.14 as of commit  871eac76e6be567
(Merge "msm: pcie: provide option to override maximum GEN speed").

Change-Id: I8fc95a4a4650de0dc36bd979d374b9335f6af774
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>