chromeos: use cache-as-ram migration API for vbnv

It's possible that the vbnv global variables may be accessed
in romstage after cache-as-ram is torn down. Therefore use
the cache-as-ram migration API. Wrappers were written to
wrap the API to keep the existing code as close as possible.

Change-Id: Ia1d8932f98e00def0a44444a1ead0018a59d3d98
Signed-off-by: Aaron Durbin <>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <>
1 file changed