lavapipe: Defer lavapipe warning to CreateDevice

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4055
Fixes: b38879f8c5f57b7f1802e433e33181bdf5e72aef
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8377>
(cherry picked from commit 9c54928f7762a59da4638a563e6c852ecbb9c76f)
2 files changed