crypto: atmel - add CRYPTO_ALG_KERN_DRIVER_ONLY flag

This patch introduces the CRYPTO_ALG_KERN_DRIVER_ONLY flag to the
atmel-aes, atmel-sha, and atmel-tdes drivers. This flag is set for
hardware accelerated ciphers accessible through a kernel driver only,
which is the case of these drivers.

Signed-off-by: Zixun LI <admin@hifiphile.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>