ARM: dts: msm: Update thermal zone thresholds for sdm670

Update various thermal zone thresholds including skin based cpu
mitigation rule, modem mitigation rule, battery mitigation rule etc.
for sdm670 based on latest recommendation.

Change-Id: Id575844aa0248456f23db1e850c0ed218aff5035
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>