tf_fuzz: allow specifying policy size in template file

Allow the use of `size <NUM>` in set-policy commands to give a policy a
specific key size (in bits).

For example:

`set policy name myAesPolicy type aes size 2048`

Change-Id: I69febd4107ed1190cf3cc780bf74fd1e02b9e206
Signed-off-by: Nik Dewally <Nik.Dewally@arm.com>
2 files changed