Use memcpy_toio to fix following sparse warning:

drivers/crypto/s5p-sss.c:386:40: warning: incorrect type in argument 1 (different address spaces)
drivers/crypto/s5p-sss.c:386:40:    expected void *<noident>
drivers/crypto/s5p-sss.c:386:40:    got void [noderef] <asn:2>*
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>