Fix compiler warning when CRYPTO_ALG_KERN_DRIVER_ONLY is defined, and Add check for "atmel-" HW accelerator.

ioctl.c:714:21: warning: 'is_known_accelerated' defined but not used [-Wunused-function]

Add check for "atmel-" HW accelerator.

Signed-off-by: Karl Hiramoto <karl@hiramoto.org>