ARM: dts: msm: Add KTM hotplug feature for apq8084

Add entry for hotplug threshold. Set hotplug threshold and threshold
hysteresis to 110degC and 90degC respectively.
Add cpu sensors mapping.

Change-Id: I8198b5023fd2184d73df4d36f7106523f4ba5339
Signed-off-by: Jennifer Liu <chihning@codeaurora.org>