crypto: vmx - IV size failing on skcipher API

BugLink: http://bugs.launchpad.net/bugs/1596557



IV size was zero on CBC and CTR modes,
causing a bug triggered by skcipher.

Fixing this  adding a correct size.

Signed-off-by: Leonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Paulo Smorigo <pfsmorigo@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 0d3d054b)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>