ARM: dts: msm: add temperature alarm device node for PM8994

This peripheral monitors the PMIC die temperature via an
interrupt and notifies the system of over-temperature events.

Change-Id: Ia97c4918bffb480d23cdb2c202b5e690dd4aaa0a
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>