mlx5dv_devx_alloc_uar(3) on Linux

The text 17f92a99095d, as Debian 13 (Trixie) shipped it.

Allocates a DEVX UAR mlx5dv_devx_free_uar - Frees a DEVX UAR

mlx5dv_devx_alloc_uar(3) on Linux now