thermal: qpnp-adc-tm: Update adc_tm register offsets for PMIC5

Few adc_tm registers have different offsets on PMIC5 compared
to PMIC4. Update logic to account for PMIC5 registers.

Change-Id: Icd55ceb9d358facc2e815541effe35a3e43b486c
Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>