vdpa: Consider device id larger than 31

vdpa: Consider device id larger than 31

virtio device id value can be more than 31. Hence, use BIT_ULL in
assignment.

Fixes: 33b347503f01 ("vdpa: Define vdpa mgmt device, ops and a netlink interface")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Parav Pandit <parav@nvidia.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20211130042949.88958-1-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>