vDPA/ifcvf: ifcvf_request_irq works on ifcvf_hw

All ifcvf_request_irq's callees are refactored
to work on ifcvf_hw, so it should be decoupled
from the adapter as well

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Cc: stable@vger.kernel.org
Message-Id: <20221125145724.1129962-9-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>