ARM: dts: msm: enable pmic alarm thermal zone mitigation for Gen3 platform

Enable pmic temperature alarm sensor thermal zone mitigation
for Gen3 platform targets. It monitors level 1 alarm and does
cpu mitigation.

Change-Id: Ia223962ea0b9aa066e7c27ebac82fd5ffb2485b3
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>