The CCP hardware interprets all numbers as unsigned numbers, therefore
sign extending input data is not valid.  Modify the function calls
for RSA and ECC to not perform sign extending.

This patch is based on the cryptodev-2.6 kernel tree.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>