drivers: thermal: pe_sensor: enable pe interrupt as wake up interrupt

The policy engine interrupt disables during apps power collapse. But
there is a chance that still other subsystem SDPM voting can be
changed and that could cause policy engine violation. It leads to
non handling of interrupt and mitigation during apps power collapse.

Enable pe interrupt as wake up interrupt.

Re-order PE interrupt clear and handling mitigation sequence in
pe interrupt handler so that there is no chance to miss interrupt
post handling of previous interrupt.

Change-Id: I2c7d3014617acc99be30d3ae727736d5695c15e1
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>