thermal: remove HotHysteresis for CPU-MID and CPU-HIGH loop

We found that CPU-MID loop will cause big bouncing (~2 degC) during
light loading test (burncycle with dutycycle), we can avoid such
bouncing by remove stop CPU-MID loop at 39.
Apply same change on CPU-HIGH to avoid similar issue.

Bug: 286773651
Test: run burn8 / burncycle_wih_dutycycle / gb5
Change-Id: I11cfbb940a556793ce1fe6d08ff06fc1df55d52a
Signed-off-by: Peter (YM) <peterym@google.com>