Revert "sched/fair: Add overutilization condition to sync wakeup case"

This reverts commit 1212399d ("sched/fair: Add overutilization condition
to sync wakeup case"). The change causes regression in some usecases
which use sync wakeup, hence revert the change.

Change-Id: I905a992a2c4d44dfa9b45ef06f0ed4b1b49b0eeb
Signed-off-by: Puja Gupta <pujag@codeaurora.org>