[PATCH] test/crypto-perf: allow auth generate followed by encryption

[Akhil Goyal]

> Allowing auth generation followed by encryption mode.
> --optype auth-then-cipher can take cipher-op as encrypt
> and auth-op as generate now.
> 
> Signed-off-by: Tejasree Kondoj <ktejasree at marvell.com>
Acked-by: Akhil Goyal <gakhil at marvell.com>