mlx5dv_devx_alloc_uar(3) on Linux

The text 82655295c0f3, as Debian 12 (Bookworm) shipped it.

Allocates a DEVX UAR mlx5dv_devx_free_uar - Frees a DEVX UAR

mlx5dv_devx_alloc_uar(3) on Linux now