vdpa/mlx5: Expose resumable vq capability Necessary for checking if resumable vqs are supported by the hardware. Actual support will be added in a downstream patch. Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com> Link: https://lore.kernel.org/r/20231201104857.665737-2-dtatulea@nvidia.com Signed-off-by: Leon Romanovsky <leon@kernel.org>