For every QAT PCI device probed, populate a local rte_device
containing an rte_driver. The rte_driver was created in a previous
patch to provide a crypto-specific driver name: "crypto_qat".
This was previously only used for driver registration, now it's also
used in device creation.
This allows applications to find devices driven by "crypto_qat".
Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>