[Feature][ZXW-100]optimize powerkey times during the DL phase

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

Change-Id: Ibb4450080b17e661d8ea94d033175531c62fb3d5
1 file changed