[Bugfix][T106BUG-421]Optimize  poweralarm demo code

Only Configure: No
Affected branch: master
Affected module: Rtc
Is it affected on both ZXIC and MTK:only zxic
Self-test: Yes
Doc Update:Yes

Change-Id: Ibf5cb1db8833cb2120ddbe56a1bf84aafca421bc
1 file changed