[Bugfix][API-1335]fix the medmcu can't be backed up

Only Configure: No
Affected branch: GSW3.0-no-common
Affected module: ab backup
Is it affected on both ZXIC and MTK: only MTK
Self-test: Yes
Doc Update: No

Change-Id: Ic48d4c9c3ba3d760b5467310579c3a8400a93d3f
1 file changed