crypto: qat - store vf.compatible flag

If the VF is newer than the PF, it decides whether it is compatible or
not. In case it is compatible, store that information in the
vf.compatible flag in the accel_dev structure.

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