thermal: rockchip: add the set_trips function

thermal: rockchip: add the set_trips function

Whenever the current temperature is updated, the trip points immediately
below and above the current temperature are found. A sensor driver
callback `set_trips' is then called with the temperatures.
Lastly, The sensor will trigger the hardware high temperature interrupts
to increase the sampleing rate and throttle frequency to limit the temperature
rising When performing passive cooling.

Change-Id: I16b2ab4f8fb85425aab5cd3777ca600bd4cace20
Signed-off-by: Caesar Wang <wxt@rock-chips.com>