vdpa: use vdpa shared for tracing

vdpa: use vdpa shared for tracing

By the end of this series dma_map and dma_unmap functions don't have the
vdpa device for tracing.  Movinge trace function to shared member one.
Print it also in the vdpa initialization so log reader can relate them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20231221174322.3130442-6-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>