crypto: qat - make adf_ctl_class constant

crypto: qat - make adf_ctl_class constant

Now that the driver core allows for struct class to be in read-only
memory, we should make all 'class' structures declared at build time
placing them into read-only memory, instead of having to be dynamically
allocated at runtime.

Cc: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adam Guerin <adam.guerin@intel.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Cc: Shashank Gupta <shashank.gupta@intel.com>
Cc: qat-linux@intel.com
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>