crypto: qat - get compression extended capabilities

Get compression extended capabilities mask from firmware through the
init/admin channel.
These capabilities are stored in the accel_dev structure and will be
communicated to VF through the PFVF channel.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Marco Chiappero <marco.chiappero@intel.com>
Reviewed-by: Fiona Trahe <fiona.trahe@intel.com>
Reviewed-by: Marco Chiappero <marco.chiappero@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>