thermal: qcom-spmi-temp-alarm: use of_thermal_handle_trip()

Change the function called during an over-temperature stage
transition from thermal_zone_device_update() to
of_thermal_handle_trip().  This ensures that all thermal zones
using a sensor are updated in the case that more than one thermal
zone is associated with a given SPMI temperature alarm sensor.

Change-Id: Ia663aa3f9b78c010214e9e30d32dab5d304cdf3c
Signed-off-by: David Collins <collinsd@codeaurora.org>