mx6sabrelite: Fix ostree image boot due to bad IVT struct

Task: https://phabricator.apertis.org/T8783

This MR fixes to issues the appeared on the ostree images for imx6 recently:

Bad SHA1 verification:

  Verifying Hash Integrity ... sha1Error: Address arguments are not
  aligned CAAM was not setup properly or it is faulty

Bad IVT struct:

Authenticate image from DDR location 0x12000000...
bad magic magic=0x0 length=0x00 version=0x0
bad length magic=0x0 length=0x00 version=0x0
bad version magic=0x0 length=0x00 version=0x0
Error: Invalid IVT structure
i.MX HAB verification: image verification failed

See patches/commit logs for more details on each specific issue.