am 4e9332cb: am 22d79a5c: make offsets in firmware update header not point to bad blocks

Merge commit '4e9332cb0bb84df4c08bbb469e59a54eab2a9df0'

* commit '4e9332cb0bb84df4c08bbb469e59a54eab2a9df0':
  make offsets in firmware update header not point to bad blocks