cgd aes rump tests failing

[Alexander Nasonov <alnsn%yandex.ru@localhost>]

I noticed that all aes tests in the new cgd testsuite are failing
on alpha. Very similar blowfish and 3des tests pass.

http://www.NetBSD.org/~martin/alpha-atf/136_atf.html#dev_cgd_t_cgd_aes_cgd_aes_cbc_128_encblkno1

Those tests create an image file on a host, configure it as a cgd
device in rump, and then write to blocks 0, 1, 2 and 3. This writing
fails for all blocks but only if a cgd disk is configured for aes
encryption.

Can someone with access to hardware take a look please?

Alex