ARM: dts: msm: Update the emergency mitigation for msm8994

Update the KTM to do emergency frequency mitigation
for A57 CPUs.
This configures KTM to do frequency mitigation
for A57s before we do emergency hotplug.

CRs-Fixed: 752677
Change-Id: Icebcabbcb082c186f177a88432e40f63ec5ff575
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>