vDPA/ifcvf: decouple hw features manipulators from the adapter

This commit gets rid of ifcvf_adapter in hw features related
functions in ifcvf_base. Then these functions are more rubust
and de-coupling from the ifcvf_adapter layer. So these
functions could be invoded once the device is probed, even
before the adapter is allocaed.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Cc: stable@vger.kernel.org
Message-Id: <20221125145724.1129962-2-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>