tree 7e3eac81dda358941c3c507d98de4d2dbbae67af
parent e077427e223363bda7bdf4991739aac981991452
author Willy Tu <wltu@google.com> 1635907882 -0700
committer Willy Tu <wltu@google.com> 1635912001 -0700

Fixed prod_to_dev_downgrade_allowed logic in validate_transition

The documentation for the prod_to_dev_downgrade_allowed function pointer
reads, "If NULL, treated as if the function always returns false."

Return `LIBCR51SIGN_ERROR_DEV_DOWNGRADE_DISALLOWED` if prod_to_dev
allowed return false or is NULL.

Change-Id: I4750256d308096e706bb9e0e0266d365b6f5a026
Signed-off-by: Willy Tu <wltu@google.com>