If clk_get() fails, device_remove_file() looks inappropriate.

The error path, where all crypto_register fail, misses resource
deallocations.

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: NAlexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: NJamie Iles <jamie@jamieiles.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>