Revert "hw/virtio/virtio-pmem: Replace impossible check by assertion"

This reverts commit 5960f254dbb46f0c7a9f5f44bf4d27c19c34cb97 since the
previous commit made this situation possible again.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
1 file changed