[Bugfix][T106BUG-305] reserve 3M for bad blocks of ubi

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

Change-Id: I9b4a1f1659601f3a9fdfb34a2e9b9712d28fa128
2 files changed