thermal: update dynamic control/switchon trips in powerhint

- Create separate powerhint json files for a0 soc
- Add control/switchon powerhints for all IPs
- Change thermal severity level to LIGHT
- Update trip temps as per policy

Bug: 194509203
Test: Build and boot on device. Check change of trip temperatures
after the thermal severity of LIGHT
Signed-off-by: Sayanna Chandula <sayanna@google.com>
Change-Id: Ibd19ea16d0fee25dec801b287e1eab05699a8d7f