Revert "crypto: drbg - use memzero_explicit() for clearing sensitive data"      This reverts commit 421d82f5b3e75f94e31875e37d45cdf6a557c120.
Revert "crypto: drbg - use memzero_explicit() for clearing sensitive data"
    
This reverts commit 421d82f5b3e75f94e31875e37d45cdf6a557c120.

None of the data zeroed are on the stack so the compiler cannot
optimise them away.
    
Signed-off-by: Herbert Xu <ef65de1c7be0aa837fe7b25ba9a7739905af6a55@gondor.apana.org.au>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs