pass: thermal: Fix bug of interval update until changed first thermal scenario

pass: thermal: Fix bug of interval update until changed first thermal scenario

The commit 6e9640753a86 ("thermal: Support dbus activation for thermal f/w")
read the temperature and then updated the system early thermal scenario
on thermal_get_scenario() function. When updated the thermal scenario,
have to update the timer interval ('timer_interval_ms' property)
if each thernmal scenaior defines their own timer interval
in configuration file.

But, thermal_get_scenario() has missed the interval update for thermal
monitoring when detecting the ealy thermal scenario on initialization step.
Because each thermal scenario is able to have their own timer interval
('timer_interval_ms' property) for adjusting the timer interval of monitoring.

[Example how to define the thermal scenario information for each h/w resource]
[thermal.scenario1]
support=no
name=Warning
temperature=65
timer_interval_ms=2000

So that in order to fix this bug, update the timer interval of monitoring
when changing the thermal scenario information.

Change-Id: Ib909539ffac357d7a804f726ae43e61a7a044d60
Fixes: 6e9640753a86 ("thermal: Support dbus activation for thermal f/w")
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>