[PATCH v2] crypto: sun4i-ss: support the Security System PRNG

[PrasannaKumar Muralidharan]

>> I have found two solutions:
>
> No we already have algif_rng so let's not confuse things even
> further by making hwrng take PRNGs.

Even if both the solutions could not be adopted I think there must be
a way for applications to use similar API to get true rng or prng.
Given the case that no user complained about prng data when using
/dev/hwrng is it safe to assume that the random data generated is
acceptable for users? If so, the drivers can be left without any
modification.

Should there be a mandate that driver will be accepted only when it
passes 'rngtest'. This will make sure that prng drivers won't get
added in future.

Regards,
PrasannaKumar